There's a saying "a sign is not a wall." You can make dangerous things illegal all you want (such as "not overdriving your headlights," hint hint), but it won't

There's a saying "a sign is not a wall." You can make dangerous things illegal all you want (such as "not overdriving your headlights," hint hint), but it won't stop people doing that. "But that person was not supposed to be there" is a rather weak excuse for manslaughter.