If they do it playfully and they obviously don't mean anything by it: [spoiler]Just pass on by it.[/spoiler] If they do it show how much 'better' they are at the game than you: [spoiler]A simple wave every time you kill them is fine, I feel.[/spoiler] For the people that do it just to get you angry: [spoiler]This is where the real fun is. If you completely disregard them, they don't get the attention they want from you which I feel angers them a lot more than retaliation. If I kill them at the very end of the match when they can't do a thing about me, I bag 'em back then leave the game afterwards. It gets them real good. If they send you an insulting message afterwards, just act like nothing happened when you message them back. Maybe they have the wrong Gamertag or you're not sure who they are, I don't know, be creative. They hopefully get angrier, then you can just go from there. Don't feel bad about messing with them, they started it, but do try to stay away from insults and name-calling. It makes you look like a child.[/spoiler] ^ That's my routine when I get 'bagged.