I think OGR does a good job veting new potential forum members but it is not fool proof. That was evident in the recent post about a transaction gone wrong. An attempt by the moderator to locate the individual was fruitless. That was because the individual did not correspond via the forum where he might be identified but rather via e-mail which allowed him to be anonymous.
One way to avoid this situation in the future is to require a response via the forum in the form of a private message and not via e-mail. That way the individuals involved can be identified by the OGR staff. Of course payment via PayPal is nearly foolproof but not everyone has an account.
I like to deal with TCA or LCCA members when buying and selling since you can look up the individual via the member directories. I like to pay via a personal check as I am one of those members who do not have a PayPal account. If there is a problem I can stop payment. I also like to use USPS since they will aggressively go after fraudulent individuals.
I also think that OGR should allow postings that warn other members of these scammers so that hopefully no one else will be taken advantage of. While there might be some concern about litigation that is rather unlikely given the circumstances.
I’m sure this post won’t last long and that is unfortunate.