OK, I just KNOW you guys will love this. All you've got to do is describe a way you would hurt, embarass, or otherwise annoy the person above you.
Example: Player 1: Woo! I'm the first person to post this! Player 2: I hold my finger two inches from Player 1's face while saying, "I'm not touching you, I'm not touching you..." Player 3: I pwn Player 2 at Guitar Hero. Player 4: I summon Chuck Norris to roundhouse kick Player 3. And so on and so forth.
PLEASE make everything rated G. I would hate for your description of you ripping off someone else's face to get my game locked up.