I've always wondered how they actually police FBOs? Feels like it would be a piece of piss just to buy a ticket in a different part of the ground and no one would be any the wiser.
I know somebody who carried on going when banned. I saw him at the Chelsea game, Robinho's debut. When he scored a steward was arguing with him for celebrating in the aisle. I had to remind him to behave as he was already banned!