Chilling effect, sure.

But between youtube, cheap IR cameras, 10k-Neuron-Net running on a raspberry pi, github open source swarming algos, extremely cheap 3'D printing, hap-hazard innocuous chemicals, and a global ubiquitous surveillance state...

A "sufficiently motivated citizen" could literally walk down the street, encounter an altercation, and snap their fingers, and have their opponent 'neutralized' within seconds, all with off the shelf hardware and open source software, right now.

These people exist, but do we really want to stir them?