It's really a spectrum of enforceability. It doesn't matter whether it's ironclad. The idea is to discourage suits and to have something to point to when people

It's really a spectrum of enforceability. It doesn't matter whether it's ironclad. The idea is to discourage suits and to have something to point to when people try to sue you. It may not work but it might help. There are many issues of enforceability and this is one of them (although do you find that argument very convincing? You'd need to be able to point to someone and have some reason for why it was them and not you in order to be convincing).