It is a private site therefore they can impose any controls they deem necessary. I don’t think there is anything nefarious going with post deletions here.
I’ve seen threads on other sites that looked like the church brawl scene from Kingsmen. They are probably trying to avoid that kind of scenario. It’s bad for PR.
But what I really popped in to say is that @mitch2 post is one of the funniest things I seen here in a long time. Thanks for the laugh!