hmm i haven't had many weird ones -- but Bryan often does poor man.  He even had an author create an account every where he writes and "stalk" him to refute Bryan's review of his book.  but i guess this is my take on it .. a product review is an opinion, opinions are like (_)(_) everyone has one. so if i put mine out there, it's possible someone else will too. hopefully mine just looks better :-D  LOL 

honestly, I ignore them, laugh to myself that they went to so much trouble so obviously they have no real life and leave it there unless it's really inappropriate. 

so, yep it happens, not much can be done about it and it's to be expected in most cases. to be honest I am surprised it doesn't happen more often.  -- but hate it when it happens to the really nice people -- and good writers!