http://www.forbes.com/sites/danielnyegriffiths/2011/11/10/steam-hacked-newell-watch-your-credit-card

^ Steam hacked? I hadn't read this before the issue with registration at a third party site.
What was all the fuss about when people disliked playing a single player game dependent on an internet game hub?

I'm registered on Steam - for no apparent reason as people have played the game for a week prior to release so the haxx-prevention bit can't be too great - to play a single player game.

Admittedly, I'd never add credit card info there, I guess I can only lose the one $75 product key.