As far as I know, the person stating that wasn't the president of the company. He wasn't an attorney for the company.
Was he involved in the company in any way? I don't doubt an attorney wouldn't have behaved in such a manner -- posting in a forum isn't the M.O. of any whom I know. There would have at least been a letter on company letter head delivered certified. But people who don't know any better are generally much more cavalier.
I grew up around lawyers; that wasn't even slightly intimidating.. ;-)
Your credentials are impeccable. I have plenty of contact with attorneys, myself, including the receiving end of a few legal threats. Attorneys are much more careful than the post in question, so no argument there. But I have no doubt an over-zealous company representative will happily sick the dogs even if unwarranted.