Prospect Lefferts Garden and Bedstuy. Given we are sharing anecdotes, I've seen my single mom neighbor shout at a group of ten men because her daughter hadn't properly slept for weeks because they thought it was fun to play with firecrackers at 4am. Apparently her daughter was cowering in fear and unable to sleep.
They just laughed at her and kept fooling around with the firecrackers.
Next day I asked why didn't she call 311. She had been doing so for months, the police never showed up. The resolution of the incident was "not enough evidence found to sustain the complaint", or something along those lines.