Decent improvement, though it still wouldn't stop people from going onto the communal team and stripping the map of all resources + ruining it completely for independent team people.
Heck, you could put it on for free! Or just make it require emails/limit it to a couple accounts per IP, since I doubt people would go through the effort to do that? Especially if it had to be gmail or smthn?
Customer support service by UserEcho