Firstly, Welcome to Basschat
I think it's safe to say that the forum is doing all that needs to be done in the way of discouraging sales of rickenfakers on the site.
However, it is one of the many uses of the site that we have reviews such as these to tell us whether a bass is good or not. Irrespective of brand this is something that we all want to know. By reviewing this bass all he the user has done is tell us what he thought of it, he's not trying to sell it so no harm done
The fact that an Ebay user has decided to use a review from this site is entirely up to him, he's not trying to pass it off as a real Rickenbacker (it clearly says in the title that it isn't), it merely states that it is a good bass (as is there perogative). If they WERE trying to sell it as a real Rickenbacker then yes, I could see a real problem with the ad, however it's on Ebay not Basschat and so we have no power at all.
I'm sure Mr. Hall or someone affiliated with him will pick up on the ad soon enough, infact feel free to drop him a line about it yourself but we don't have anywhere near the resources (or the responsibility) to police every sale on every site. As such we must contain ourselves to policing our own forum.
Sorry to hear you previously got ripped off with a sale, I trust it didn't happen on here? If you're ever in doubt about a purchase again a thread on here can turn up wonders if you have access to some decent photos of the item you're thinking of buying.