A quick question about feedback system

It sure would be nice if you guys would add some sort of feedback system here similar to what Ebay does. Then you could know right away if the person you are dealing with has already completed transactions here without incident. It should certainly cut down on people creating fake accounts just to try and defraud people out of money. If some new person creates an account and they suddenly have 10 listings for timeshares...it would be nice to know that..and I would be highly suspicious.