>This group-hug-golden-light-"Can't we all just get along?" crap is exactly that: Crap. It does not work in practical application.
And neither does your suggestion. Take away the playgrounds, and kids just go and find somewhere else to go and play, and they're usually far, far cleverer about it.
If you want to act like the big kid, sure, go ahead - if you do it sensibly. Act like a bully, however, and you'll probably come to a similar end. And to be honest, your comments smack of that self-same brutish naïvety that lands them in trouble.