I'm leaning more towards semi-unrestricted (postings), but with caveat that lots of 'monitoring' takes place, and a person posting has a tacit acceptance of that. Hmmm that sounded like a 'cookies' notice.
Some posts get a bit playful, as in something from Electroboom videos. I see that (non-serious) as a valuable factor, in entertainment...Maybe the Nuclear Engineer comes home, for the evening, and wants only frivolous, and yes, maybe pure stupidity, for a couple seconds, before repeating a potentially crappy daytime job.
Just go for the harmful posts, and, of course, keeping everyone's basic privacy and no expressions of hostility, at least.
===================================
I'm reminded of the classic 1950's TV show,
'Leave it to Beaver's with an episode dedicated to a 'Lying adult' who told untrue stories..., followed by pitching the kid for some $ money.
At end of that episode the kid (i.e. 'Beaver') admitted that he gave the man money, saying:
"I knew he was lying, but it was a good story".
THAT sent the older brother off, shaking his head, trying to wrap his head around the concept.
If it's entertainment, partially, let the fools lie! They better be good though.