For those social situations where it would be too great an escalation to start throwing fists, or if you generally wish to non-verbally convey a GTFO vibe, it’s worth perfecting your death stare.
I perfected mine in my late thirties, to the point that I can scare people without saying a word.
Unfortunately, I’m now told that my resting face is also scary or angry looking. I got some passport photos taken a few weeks ago at the local pharmacy and was pleasantly surprised - still have hair, wrinkles didn’t look too bad, etc. when I showed it to a few people in the office the response was something like ‘too bad you aren’t allowed to smile, you look so mean and angry’.