Mobile Phone verification method

Not really understanding this one... nor do I really back it. Phone verification wouldn't combat this issue? If you required persons to input a Valid phone number, what stops them from spoofing it? You'd have to manually check it, which isn't really a viable option for a forum site that isn't "Huge" per se.

If you're on about apps being used to verify, then that would just as easily be combated. The energy being used to implement and police such options wouldn't be worth the while, and in stoping leachers, you'd also hinder and deter normal users. Something not good for a forum.