Well, to be fair, if it is genuine and not a prank, adywan wasn't banned for posting an off-topic link. He was temp-banned for losing his cool in a glorious fashion after a warning, and then perma-banned for creating a sock account and continuing the flame war. Those are justifiable grounds for banning. Others have been banned for similar activity, and adywan has to be held to the same standard as everyone else.
That's if it's genuine.