They're called "Gimbal's Tossers", and they throw stuff. But, like I did, you can take their rocks and vodka bottles away and give them guns, since there are West tossers, East tossers, and Resistance tossers that look just like civvies (all he did was change their side and give em stuff to throw).
It's a relatively small file...278kb UNzipped...so I figure if I ever shipped a mission that used them, I'd just lump them into the ZIP myself.