I was playing Halo 2 today when I realized the most perfect and evil strategy to winning.

Start a new custom slayer game and go to coagulation. Make sure you're by yourself when you start the game. Grab both of the sniper rifles and get a banshee. Fly to one of those high ledges with a banshee. Now when your up on the ledge, invite all of the people on your friends list to the game. Now, when anybody joins the game, they can easily be shot from your current position. Shoot them in the leg and watch as they hopelessy try to figure out where their being shot from. Finally, send them cryptic mail messages, like, "I see you" and "I like caek". Hilarious.