I RARELY blacklist, (look at my meager blacklist) pretty much only way to get on my list is to (a) Be a rude ass AND (b) Abandon the game when you get trounced. like this guy...
[Sapessi](
http://warlight.net/Profile.aspx?p=368845732)
Apparently just started a week ago.He's rude and an ass. When you stomp him, he just abandons the game. Hence, his 37% boot ratio. Awesomeness..