Seen on a mailing list:
My friend has found a catch in that free iPod giveaway you’ve been seeing. He just got his and now I too want one for when I bike to work. You just sign up for a trial offer (AOL, eBay, etc.) and then cancel before your trial period is up. This way you won’t be charged anything. Once you have five friends do the same you get a free iPod. It’s close to a pyramid scheme, but not quite since you don’t have to put any money into it. Catch this loophole before everyone else does.
Or you could just go to Duke University . . . .