The contract of adhesion theory doesn't really apply considering you can easily decide not to buy the game. However, the fact that Blizzard includes a bunch of words on a "terms of service" that you only see after you buy the game likely would render any unusual terms unenforceable. The contract between you and Blizzard exists upon the sale of the game, not upon installation, regardless of whatever lengthy agreement everyone just clicks through during the installation process.

Quote Originally Posted by VeloZer0
You can't actually but SCII, you can only lease it.
This is not in the slightest bit true. It may indeed be considered more of a privilege rather than a right to use Blizzard's online multiplayer system (though I doubt that; I'm sure Blizzard has to show some sort of cause, although they will certainly have wide discretion), but the right to the game itself is ensured by the sale. You offer to buy the game, the distributor agrees to sell it to you: this is a contract of sale.

That all being said, I'm not even trying to argue that Blizzard can't legally do this (though it may be dubious, depending on Blizzard's policy). My point is that it's absolutely nonsensical to disable someone's game for screwing around in single-player. Regardless of your personal feelings on cheats (I would never bother, personally), regardless of your personal feelings on achievements (they are pretty damn pointless), you cannot tell people how they should enjoy a game. It doesn't matter if it's pointless (I agree it is), it doesn't matter if it's stupid or ruins the gaming experience. It's their time being spent, not yours.

Jesus christ, people. At least try to actually form some semblance of a logical thought process rather than a knee-jerk reaction to people using cheats. If the assertions in the article are true, this is completely indefensible.