Clashero said:
The first one was so good and unexpected I actually laughed out loud

I can imagine the people looking at it in the street with their heads to one side going "Hmm?" like Scooby-Doo when something goes way over his head.
That's a good idea. Just a picture of Scooby-Doo's head, with the words "YOU DON'T GET IT." Personally I think that show was one of the dumbest, most pointless things ever on television, but it would be fun to mess with people, making them think there was something more they were too stupid to pick up.
Greever said:
That's along the lines of one I came up with a long time ago: "This is a meta-shirt. Laugh."
reaper_2k9 said:
I'd make one that said "I'm exalted with your mom"
I don't get it. But it is awesome.