Obviously you can't police the world, but if there is a system that prevents abuse that they have the ability to use, I see no reason not to use it. Also, this

Obviously you can't police the world, but if there is a system that prevents abuse that they have the ability to use, I see no reason not to use it. Also, this has nothing to do with legality, only TOS/privacy policy violations that you agree to when you sign up.