I haven't seen anything nearly as bad as what you guys do, though I do know some of the types that take cheesy spam armies against new players.

The most cheesy army list I came up against was from a tournament player, but he was a good man and hardly a WAAC player. He had an incredibly deadly Grey Knights army that no-one could deal with, though he was up front about it and was very open to people that he would likely win. In essence, a highly competitive player, but a nice person. Those kinds of people don't bother me whatsoever.