To me, there are two kinds of curmudgeonry – firstly, the old man who has given up and hates everything and everyone, wants to be left alone:
As men grow old, their hearts grow cold.
But there’s also a constructive curmudgeon, someone such as Arron, who is misbehaving “in a good cause”, let us say, and Roger is another. I believe that there is still a key role such a detested demographic has to play:
[H/T Chuckles for the pic]