I’ll always easy to tell a mob apart from just people milling around, which is becoming more and more common in urban areas. Personally, my decision tree looks something like if you wanna make noise slap on the car around I’ll sit there and smile. You start taking objects against the car and I’m gonna start rolling slowly, I see a gun or they break a window and it’s pedal to the floor and I don’t give a crap until I’m well clear. Picture those cargo vans in Cairo a few years back.