Holy hotseat! 8 people! That musta set him back about $1-200 (though maybe more at his prices). All he has to do is prove all this bs. Then, even IF he could prove your post cost him all 8 customers, he would have to prove you actually did anything WRONG. Duh!
The guy's on drugs....or, maybe not taking the ones he is supposed to.
If you actually get papers, play the game and countersue if it's not too much trouble. Just make sure you take a big "Bubba" along with you if this ever gets to a meeting in court. This is the stuff TV shows are made from.
Oh, yeah....each of those 8 "lost" customers would have to either show up and testify or send notarized affidavits, which you have the opportunity to refute. So, he has "jack".