Definitely not a "gun forum" thing so much as a "forum" thing. People tend to say things over the keyboard that they would never say in person. Anonymity can bring out the worst in people.
It's definitely a forum thing.
If you thing OSA is a "rough" forum, this must be your first day on the internet. Go to some popular automotive forums and post a question that's been asked before and you'll find out a whole lot of new things you can put in weird places, household chemicals you can drink, and rusty kitchen appliances you can fornicate with. Those will be the replies you get. I honestly think OSA just has a lot of people that are not used to internet banter, or banter period. I swear some people here must have a "no sarcasm, wit, or flippant humor" sign in their houses.