Sony and Schick, along with Edge shaving gel, are currently holding a promotion to get free downloadable content codes in exchange for shaving product purchases. Specially branded packs of razors and gel contain codes which can be redeemed on this site.
The only trouble is ... it's gone terribly wrong, and people are gaming the site to get free gear.
This thread tells you how to do it. You just pop along to the site, give them a load of fake personal details, and then input a pre-existing code that the site won't recognize as having been used. You can also get codes by looking at razor packages on Amazon, because they haven't been obscured.
Once you've done the deed, you can pick a Retro Map Pack or three Unlock Points for Killzone 3, a Chevy Camaro SS "Edge Special" for Gran Turismo 5 or a Sniper Blast ability for inFAMOUS 2.
I'm sure there's something about morality in this but ... it's too funny to get bogged down with the rights and wrongs. Oh, and don't ask me how I got my Sniper Blast, bitch!