RPi+cam+wifi+servo+spray=DIYControl
Why do we assume govs are the only ones who should have these? Where are the NRA fanatics on the right to arm ourselves with items beyond the tech of 100+ years ago?
" Police say the drones will be more effective than batons in tackling "unruly mobs""

Police in the Indian city of Lucknow plan to use drones armed with pepper spray to control unruly crowds.