Hopefully it works for you.
So last night, I was in the DZ for a while solo, just killing enemies to rank up. I saw a 3- or 4-man team running around, doing the same as me. We got into a big battle at the oval shaped extraction point (DZ03 I think) and we killed all the mobs and extracted several times. Then later, I found them again in one of the subways; again we cleared it all out and all was cool.
Then I killed a group of Cleaners with a named guy (Hardaway?) ... he dropped a gold AUG, my second gold item drop ever. I grabbed it, and super-cautiously started heading to one of the DZ01 extraction points. I figured I'd be less likely to get overwhelmed by enemies I can easily handle, ya know? And sure enough, on my way there, the same crew I had peacefully coexisted with several times earlier decided to ambush me and steal my AUG.
I was salty as fuck.