Mark them when they come to loot you. Even if you're a bluesuit dying in a respawn zone, don't fret. Dudes will come and try to loot you, I promise.
If you want to make enemies, try to change something.
It went because people complained about it, then a new set of people complained when it was gone
I think the current aim is to have it return when theres been a rejig of the gang system and it can be passed on in game, not downloaded somewhere and everyone magically knows everyone elses business.