Unfortunately caserios can pop up anywhere in the future so there are no guarantees. Most of the people there are good people if poor but there is also always a drug distributor running things from his mother or grandmother apartment and sooner or later somebody always wants his turf.
Shit happens but put your fears aside, it is not all bad, it is a concentration of people, a possible market also for legal activities like a Panadería or gas station or neighborhood convenience store.