On bad behavior?

No. We should not. Give them a discount at restaurants and stores, and give them your seat on the bus. But on attitudes and actions? No. Don't budge. Especially if they are supposedly saints of God.
There...I answered the question but now I'm going to give you the "why" behind my answer.
I for one am sick to high heaven of older Christian people acting crochety -- or worse -- and everybody side stepping a confrontation over their behavior, or rationalizing it away because of how many years they have lived.
Do a bunch of birthdays qualify you to act like a jerk or like a woman with perpetual PMS? Apparently for many it does long after the years where "that time of the month" are long over. For many when they are young they use the "that time of the month" excuse for their ill behavior, or the fact that they are laden down with raising a few kids who are difficult. Then we hear the "going through the change" excuse, and pretty soon they run out of excuses...we just have to accept, they are old and mean, plain and simple. Instead of focusing on the joys of life instead of the pain, and allowing Jesus to make them sweeter, they have chosen to become sour. And really, it is a choice.
Don't get me wrong...I love old people. I wouldn't be here if it weren't for old people. Some of you reading this might not think so by the tone of the above paragraphs but this might better explain it. I had a saint of a grandmother. She went through more stuff than you could shake a stick at. But she was never mean, or acted like she was on a constant cycle of PMS. She KNEW JESUS...really knew Jesus, and it affected her life in such a way that the more birthdays she had, the sweeter of a fragrance her life became. So now that I am pastoring some people (and have in the past as well) who don't always reflect that...I'm going, okay...what's this all about?
When I was a kid, and I would do something wrong I'd hear, "Deanna Lynn Doss! You're 5 years old now! You know better than that!" A few years would pass and if I did something out of line, again I would hear... "Deanna Lynn! You are 10 years old now...you know better!" So, why don't some people know better by the time they are 62? I mean c'mon, their Moms and Dads are long passed away, but does their PASTOR now have to rise up and say, "Martha Jo McGillicuty! (or whatever their name is), you are 73 years old now! And you know better!!!"
With the grandma that raised me, I had a front row seat in seeing a person who grew in her faith year after year right up until the time Jesus took her home, and each year she fell more in love with Him and with people. My grandma was on her death bed with cancer, her body racked with pain, but still...everything within her radiated the love of God. I remember she asked me to come and sing for her one day at the hospital. I went and she asked me to sing, "Bread Upon the Waters," one of her favorite songs that I sang in church. I took grandma's frail hand with many lines and crinkles on it from all her hard years of work. Even in a cold hospital room, her hands were warm and welcoming like they always were. As I held her hand I began to sing, "Oh there are people, never receiving anything from God at all...oh they are shaking in their believing..." and when I got to that point of the song on just the second line, I burst out crying. It was just too much. She was weak, her body totally drained, yet she sweetly managed to say, "that's okay hon, I understand why you can't sing right now." And she pulled me to her on the bed while I cried.
My grandma could be pushed by people, pulled by them, attacked by the enemy, or plagued by sickness but she never got rebellious or mean or did some stupid thing to her pastor or anybody else in the church. To me, that was a woman of God. So when I see critical old people I can't help but wonder..."are they saved?" I know, maybe that's a hard question but it's not one born out of meanness in me, but honestly wondering how a person who has supposedly known Jesus a bunch of years can act so stiffnecked sometimes.
My grandmother would never even THINK of criticizing her pastor or church. (She stiffly rebuked anyone who even sounded like they MIGHT be insinuating something like that.) She never talked about what she didn't like at church. If she didn't like something and she could possibly help the situation she just went and did whatever it took to make it better.
Some people think that when older people do something out of line or unbiblical we should just sort of let it pass because...after all...they are older. When did being old mean you weren't accountable anymore? When did having more candles on your cake mean you could say whatever you want and just expect people to understand your sin instead of confront it?
One thing that has always frosted my flakes is that when the youth of the church do something that is perceived that is out of line, people are very quick to jerk them right in line. And usually it's an older person pointing this infraction out or many times taking it upon themselves to correct it though sometimes they have absolutely NOTHING to do with the situation. No one blinks an eye at that. But when an elderly person has a critical attitude, instead of jerking them in line we say, "well, you have to understand the viewpoint Bro./Sis. so and so is coming from." Okay, why didn't we try to understand the viewpoint the youth in question was coming from? I am no teenager at this point (I'm 40) but I can understand why many youth get disillusioned by this rather unjust system that seems to be unspoken but very lived out in most churches.
If I get like this when I am old, I just hope the Lord will have compassion on everyone around me and take me home before I hurt a bunch of people or at least drive them crazy. I pray to God that when I am old and feeble someday, I am my spiritual leader's greatest blessing, not the bane of their existence. I want to lift them up to a higher level with my experience and my prayers and what I have to offer...not make them tired. I for one, want to INCREASE in my love for Jesus and in the fruit of the Spirit as I grow older. I want my legacy to be one like grandma's. If I can't be like that, to me there is no reason to be in this world. We are here to make a difference...to leave a legacy. If I can't do that...what's the use?
To all my friends reading this, please mark it down. I've said it right here for all the world to see. When I get older, CALL ME TO ACCOUNT. Please don't let me act like an idiot without somebody stepping forward to whip me in line. Don't shy away from me just because I have gray hair and walk with a cane. Just because I've seen tragedies in life and been through a lot, don't give me a free pass to recklessly run around sprinkling negative words on people. When and if you see me become mean, say to me, "Deanna Doss Shrodes! You are 80 now! YOU SHOULD KNOW THIS BY NOW, GIRL! So start acting your age IN JESUS!" I want somebody to point out to me should I become that way, that if I'm truly "in Jesus" I'm acting like Him. Please friends, if I start acting like a crotchety old coot, please feel free to come over to my house and give me a kick in my Depend! :-) Don't let me act with reckless abandon, hurting my friends, my neighbors, my pastor, my church. I encourage you who are my personal friends to feel free to be a convicting presence in my life and tell me the hard things. When I hurl a criticism at a teenager, don't pat them on the arm and say, "Cut Sis. Shrodes a break honey, she's old and from a different generation and she just doesn't understand you." No, I want you to take me by arm and share with me the importance of accepting, loving and apologizing to that teenager. Do what it takes. Lure me away with a latte and a chocolate cookie and say, "Now Deanna, there's something we've been meaning to talk to you about..." Just give me the one-two. I give you full permission to lace my Metamucil or my Ensure with a sedative if you need to calm me down long enough to listen to your reasoning with me about my destructive behavior to myself and others.
Please friends, whatever you do, don't let me get away with being fussy when I'm an old woman. I don't want a break from you. I want you to remind me that especially at the winter...the closing chapter of my life...I need to reflect Him who has called me more than ever.
Thank you, friends, for watching out for me as I grow old. Save me from myself if I need it.