Sorry that you got your feelings stepped on OP. With your current level of experience and knowledge I would strongly recommend that you avoid EMS forums and comment streams for a while. I applaud your efforts to use the internet to broaden your knowledge. Understand that forums and comment...
Any time you have a title that garners some degree of respect in society, you're going to get some fakes who want the respect without putting in the work. Forget about the law ... just don't tolerate it.
My advice is to out the guy (or gal). Tell them point blank that you, quite frankly...