Get proof of age, maybe? You would get carded at a strip club, why not at least try for some sort of equivalent and exercise your best judgment based on the response? I'm not accusing anyone of trying to meet minors, I'm saying that those engaging in ERP should take steps to cover themselves in case they get put in that kind of situation, and any sort of effort whatsoever put in to verifying is better than "well if they lie about their age oh well".