Not PC has an excellent definition of a ban:
BAN, v., Often seen as action (e.g., Government acts to ban X), but in reality a government action taken to prohibit private action. Often punishes all for stupidity of one. Assumes that policians acting hastily in response to headlines have better judgement about individuals’ action than do individuals themselves; and completely removes any possibility of judgement or of responsibility for actions. Assumes too that policing 0f ban doesn’t cause country’s laws to fall further into disrespect, and that ban is capable of being policed. Often taken in reponse to headline-grabbing tragedy
Bans should be the last, not the first resort, of a Government.