Moderators (requests and notices)

In a rare exception, I've banned william1984 for 3 weeks by his request. His MA was suffering.

If anyone sees an alias that is him, tell him to fuck off and work on his studies.

Out of interest, when you do this (or ban anyone) what exactly happens to them? I presume that they can still view the forum as a guest (obvs not private etc) or set up an alias? Or do you some magic to stop them getting anywhere near the forum.