The biggest issue I find with kids (well...pretty much the only issue) is that while they think they're incredibly mature for their age, they usually aren't. Which is when the conflicts of attitude start. I generally treat people as I find them so if someone is a dick to me they'll get ignored. If they want to play the game and have fun and not be a dick to everyone else then happy days. But as I said, that's everyone not just kids/teenagers/what have you.