The types of legal action suggested by these radical pumpers has been tried numerous times and has never, ever, in the slightest degree succeeded. In general, the courts have ruled that anything posted in the type of message board IHUB runs, is always considered to only be opinion, whether expressly designated as such or not. Secondly, company officers are considered public figures and are legally subject to criticism in posts. and, "truth" or a reasonable belief that what is being said is substantially true is an absolute defense against libel, etc.
So let them throw their snit-fits and stomp the ground like six year kids who just found out they can't have their own way. It provides us with great entertainment.