Trojan: Using your scenario as an example, it would appear that the blogger might potentially be guilty of inducement to fraud as well as collusion. The problem with that is this: Unlike a “pump and dump” scheme, the homeowners in question are under no obligation to accept the lowball offers and, even presupposing that the blogger in question commands that sort of vast readership, there would have to be enough individuals in that area willing to go and make offers.
On the face of it, it appears like a conspiracy of sorts, but it falls apart when you pay closer attention. However, and here you make a good point, if there was a third party who was aware of the conspiracy, well, that changes the calculus somewhat. It would certainly be unethical and immoral, but it’s doubtful that it would actually be illegal and, therefore, where is the threat to this blogger? He wouldn’t really be facing criminal and/or civil charges, so why worry?
