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
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.