JurassicParking actually made me lol when I saw it.
I saw some guy named walgreens_slave as well, and that was grin-inducing. Gotta love minimum-wage jobs.
There were some my friends made to troll some big-name players, that were pretty hilarious, I gotta say. Won't name 'em off here, but they're worth mentioning.
I know I've seen some other epic ones but I just can't recall them at the moment.