There's a law that says you mustn't do 50 in a 30 zone and penalties for doing so are laid out. The FA just have a catch-all rule that says you mustn't drive "improperly" and if they deem that you were doing something improperly in their view that they can punish you or not in any way that the blazers seem fit. Probably depends whether they consider the case before or after a long lunch.