Agreed with Bob. It sounds obviously vindictive enough that I wonder whether it actually is ... I mean, he must know that re-banning you will look bad for him, so why would he do it? It's possible that he was not in the loop when you were un-banned, assumed it was an error on their end and rectified the perceived error. Or maybe he is just a jerk with the self-preservation instinct of a lemming ... but I'd give the benefit of the doubt before getting incendiary about it.