I had the same issue. On San Jacinto Ave. in Dallas we serviced a junk-ass chiller at an apartment complex. When it went down, the Section 8 ferals got a case of the ass real quick. I just left. The boss agreed completely as he didn’t want to lose a truck or a tech.
Not sure if it’s changed the the late 80s but EMTs told us that locally on all calls to section 8 housing no EMTs go on a call without police back up. Main reason was so that the ambulance doesn’t get looted while the EMTs are inside the residence.