You have to register on the site and they ask for quite a bit of personal info to verify your age. Once you sign-up, enter the sweepstakes and then click the link for the free shirt!
whomod said: I generally don't like it when people decide to play by the rules against people who don't play by the rules. It tends to put you immediately at a disadvantage and IMO is a sign of true weakness. This is true both in politics and on the internet."