OK- most of you won't get this, but SpoDudez0r, LioConvoy, Calliander, Caniprokis (maybe?)and Peps should find it funny enough:
This comes from a response page to this article by a guy who worked at Wizards of the Coast, the people who produce Magic: The Gathering, and D&D now.
"Card games suck. They limit storytelling rather than enhance it and put a choker collar on the imagination. Only role-playing games (true ones like Palladium's Rifts or, the granddaddy of them all, Dungeons and Dragons) encourage true role-playing, the kind you don't get at your local S/M club or your therapist's couch."
-some dude, http://www.salon.com/tech/letters/2001/03/28/wizards/index.html
The joke is the letter-writer using Rifts, Rifts, people, as an example of a game that encourages "true role playing". Given that the letter is already kind of pretentious and stupid, using that as a reference is funny if you've ever played Rifts.
St00n, Ro-bot Superhero.