As long as you have no credit cards tied to your account, there's no way they can charge you. Worst case scenario, they disable the account and you lose the 4 free games.
Phew alright. I got Spore, Spore Creepy and Cute, Dead Space, and Mass Effect 2. I got spore and spore creepy and cute together in one cart with two incognito windows opened at the same time, mass effect 2 in another cart without an incognito, and dead space through the original software. I dont know how they dont miss such a gaping flaw.
I feel like they did this as some sort of publicity stunt so people actually open origin