They did a casting call in Baton Rouge a few years back, that's how Theo from RR got on.
I have a friend...well, not a friend anymore, but a guy I know, is such a mean person he'd be perfect for the show. He's one of those people who is hiarious until he turns his sense of humor on you
I've also considered making tapes of random friends while they're doing homework or at their computer just to be silly and send them in