That's true, although I think it would cause a huge controversy to sue someone over it (rather than just banning them). It implicates all sorts of questions tha

That's true, although I think it would cause a huge controversy to sue someone over it (rather than just banning them). It implicates all sorts of questions that are already controversial in the free-culture community, like to what extent ToS should be legally enforceable as contracts. Even worse if the editor is from outside the U.S., and controversy over extraterritorial application of U.S. law gets implicated.