You really can't sue for a ban. You did an act against the rules, and the result was a ban. Hope you can understand how this is not an action I think you can sue for (or at least I think, correct me if I am wrong). :D
Is this a big enough bug, since we seem to be getting random money, that we should start a conversation instead of a regular thread? I have not noticed it as much but still think it is still happening.