We've had lots of people claiming to be medical professionals and then they post things that make it immediately obvious they are just the usual liars.

I remember, before lieHUB mass-banned over a dozen of us, that one guy who claimed to be a doctor who had use some drug "many times" to treat patients -- didn't even know how the drug was administered. He claimed to have prescribed a pill when it was injection, or maybe the other way around -- I don't remember the specifics now. Anyway after I outed him he disappeared. I'm sure he came back again claiming to be a doctor or researcher.

Hard for normal people to understand how anyone can be such a liar.