@Bacterius -- arguably that's why they decided to make a multiplayer game rather than a single-player game. Cracking the MP part requires fooling the online authentication, which can be practically impossible (when was the last time someone cracked your online bank account?)
Of course, I'm talking about games with a significant single-player component which force you to be online "for authentication purposes" (e.g. "I want to check if you are playing this single-player game legally"). Multiplayer games obviously require you to be online while playing. Though this rush towards "you must have/purchase an account to play" is not always warranted, people care so much about stats, they've apparently forgotten what it means to have fun, and, really, so have I, to some extent, after so much bullcrap. I know money has to come from somewhere, but.. come on, this is getting stupid. I know this is old, but does nobody remember playing UT99 with their friends? Did we want to deal with this crap at the time? Do we want to now? We play games to escape reality and enjoy ourselves alone or in groups (or with strangers), not to be presented with endless error messages of "this cd key has already been used", "your account has been banned", "the servers are down", "we have detected your authentication key is invalid", "your password has been reset", and so on..