freedomrider
Ordinary average guy
I think you hit on part of the problem, people conflating a forum with reality. Grammar has little to do with the 2nd amendment.
Humor is tougher since it can be interpreted in different ways. I took Fireman78's grammar comment as being facetious, but definitely with a little targeted bite. Then again, maybe he was completely serious. Funny, I just looked for the palms-in-the-air "don't know" emoji and couldn't find it among those on the site. That's a pretty common one on well-developed discussion fora.