I really hate age discrimination of any kind. Most adults I meet are starfishs to people who aren't mature, however not being mature doesn't mean you aren't intelligent. Not to mention I've met kids who have better logic than most adults, and honestly I feel bad for them. Do you know how hard it is to win an argument with a teacher who is obviously wrong? You can't. The only people who have any authority over anything in this world are adults, and it's kind of obnoxious.
On the other hand though, I also realize some kids are annoying as hell. I don't know why but I think kids are just naturally less... "Intelligent" isn't the word. Less noticing? Until a certain age. I remember when I was younger I played MMO's and looking back I realize how handicapped I was when I talked to people. It takes time to get used to the internets, and childrens aren't even used to the real world yet let alone a virtual one.
TL;DR: Both adults and children have their faults. Get over it.