Perhaps, if you simplify rules for posting down to like five quick rules, that they have to agree to before posting for the first time. To tell the truth it doesn’t really bother me, but I know groups had to make these rules for obvious reasons.
I belong to other jewelry forums and you do have people who just want a quick answer so they can sell whatever they have found, and have no desire to learn anything about the jewelry. Then you have those who actually are at the beginnings of being interested in learning, so you don’t want to block them from learning and enjoying it and the becoming collectors.