Supporters of cultish fringe politico
Lyndon LaRouche (he's the guy who claims, among other things, that the Queen controls the world drug trade and Beatlemania was created by the Occult Directorate of British Intelligence) recently held a rally at the University of Washington;
pranksters join the rally, wearing tinfoil hats and wielding signs calling for an escalator to Mars and railing against toaster-based mind control, the B-battery cover-up and the media's conspiracy of silence on the government sabotage of the Trans-Atlantic Bridge; pictures
here and
here. (via bOING bOING)
Actually, the LaRouche supporters are a pretty much constant presence on campus. There's a table with literature and at least one earnest kook almost every day. The prank was set up in advance without knowing where the LaRouche folks would be that day. As far as I could tell, the tinfoil hat brigade walked around campus until they found the LaRouche table, and then set up camp across from them.