Marshals, vigilance committees, and citizens used to hang horse thieves and cattle rustlers. Merchants and farmers applied 12 gage justice to thieves, birdshot or rocksalt, their choice. Card cheats and pickpockets were shot and hanged if they tried to defend themselves, and we got to a point that you could leave your house unlocked.
All of this was done by consent of the general public and public intimidation of those that did not agree.
The day we prevented the honest citizen from using lethal force to defend his legal property is when we killed the society that prevents our decent into animal barbarism.
I'm convinced that things will fall apart and that vigilante justice will come back. It will be :
"Last week someone stole my chainsaw. I saw this guy hanging around this morning. I didn't know him. So I shot him."
"Nice! Can I buy you a drink?"