That is not, to my knowledge, actually tested legal doctrine in the US. It all comes down to what is determined to be enforcable and how much time and money folks are willing to spend on it. I do not recall seeing a binding arbitration clause which is usually accompanies such changes.
To draw a parallel, if your World of Warcraft account is banned due to hacking the game client to trick the server into giving you an advantage and you sue for the money you spent on WoW, Activision/Blizzard will move to have your lawsuit moved to arbitration where they will most likely prevail. They will point to your acceptable of the EULA and the ToS stating that you agree to using arbitration for the disagreement as well as using it as a method to prevent a class action lawsuit.
The difference here is that there is nothing forcing, at least from what I recall being asked to acknowledge receipt of, you into arbitration, alleged rule breaking or not. This was just a cautionary post to make sure folks read any changes before clicking accept should they end up as part of the collateral damage when SS goes on the next banning spree. One of the things mentioned was to go and dispute the charges with your credit card company. Part of the changes that you accepted when you click "I agree" will be used by Mobage to block your charge back attempt. You have to then weigh how much is it worth to you to get your $$ back from SS should you feel that they banned you in error.