Really hammers home the point that a certificate is just that, a piece of paper, unless backed up by a bonafide inspection of the car in question. IMO, the only way to avoid making a costly mistake is to hire someone you trust, and knows what to look for.
And yes, would be neat if folks who had information about a possible bogus car would pass it along, but trust me, that is a very slippery slope. Been there, done that.