That seems like a terrible new practice, banning one from accessing their single player account. If you get banned from the forum and they decide to ban you from the game, it should only be the multiplayer you are banned from (not that I support that either). To put a user on what seems to be a permanent ban for being an ass on the forum (or rather, for pissing off a moderator) seems to me like a new form of theft. People have to pay to play EA's games. There is the initial sale, not to mention subscription fees. If you buy Spore today (for some reason) and get banned tomorrow it is as though they taken your money for the sake of taking your money. Doesn't sound like a good business practice and if they want to stay as big as they are, they'll reconsider their new policy.
This is actually the kind of thing I am tempted to test. I am playing Mass Effect 2, not even at the mid-point but, if I get banned from their forum, I wonder if they could lock me out of the game itself. Or...if their power reaches to the consoles yet...it's only a matter of time I guess