It does appear that a single poster started a number of gun threads. They are also sort of contradictory to each other so it looks like an attempt to troll. I have removed them.

Agree! I came here to ask the same. This one especially: https://www.dcurbanmom.com/jforum/posts/list/848673.page

So I've noticed that several of the gun posts in Off-Topic are started in the middle of the night like that insane one about calling the police b.c someone is selling a gun safe. Which seemed to really play into some right wing conspiracy crap. And now this pointless concealed carry one.
I can't see how this isn't trolling by Russians.