All I'll really say on the subject is that there's way too much fighting on the station in general, especially fighting which makes absolutely no sense and security either does nothing or does something and gets accused of metagaming or powertripping. While I understand that this can definitely happen a lot with security, it seems basically assumed that security are all giant fun spoilers which doesn't go anywhere in encouraging them to be any different.
We've all got to remember that as employees of a company even starting a fist fight in the bar would probably be a crime worthy of suspension or indeed expulsion from service. Although I'm aware NT isn't exactly your average employer, as I've frequently compared them to Weyland Yutani and believe that the stations are lures for the real experiments, they're still not going to be too happy about staff breaking into armed conflict immediately and jeopardising their possible nefarious purpose (Or benign purpose).
And yeah, maybe the characters have history with each other, maybe they're just assholes, but pretty much every round I played tonight the station devolved into mass arguments on common and near constant fist fighting. It's no wonder security are heavy handed, they're probably tired of it going that way too. Maybe it'd be a good idea for people to alternate between their asshole characters and nice characters a little more frequently? I'd like to see some rounds where the understaffed security aren't constantly running around solving petty squabbles, and I say this as somebody who's frequently just observing from my laboratory fortress. It's become pretty much standard practice for me to exile myself to the Science division because I can actually get some talking done and not have to be constantly afraid of getting punched, shot, stabbed or otherwise maimed by people who aren't the antagonist (Not that antagonists ever target me until they've got nothing better to do).
I played an extended where it seemed as an outside observer just reading the common channel that most of the station was ending up in and out of the medbay for various mild to severe injuries from things that probably had nothing to do with 'legitimate' problems.
It's probably sort of expected to be that way now, but I'd say that's probably the issue, the violence is expected.