Sounds like someone's a first-year legal student or a Wiki-warrior who thinks he has a semblance of how the monolithic American legal system works because he read a book about it. Let me give you some advice: It's not going to work. If a company that handles online gaming could get sued for banning people, there wouldn't be online games because every idiot that ever got banned would sue. Arbitrary, frivolous litigation is the American way so most companies that interact with the public have their asses covered better than an Eskimo. You can run off all sorts of fancy words about how it technically violates this or maybe comes close to this, but you don't really have any grounds to sue on in the first place.