Do you really want to hurt me?
The collective trauma of any such act would make the remaining civilization implode.
I doubt that very much.
The USA slept through Hiroshima, Germans dozed through the Holocaust, Russians glazed over during the legislatively-induced famines.
We are sleeping on top of a giant underclass that murders, rapes, brutalizes and steals from itself constantly.
We are totally content to watch 5,000 cows get herded into a steak machine or to watch chicken farms toss male chicks into grinders.
Several billion people are starving and disease-ridden right now. We are content to give that 5 minutes a month of feeling bad, maybe writing a check to a useless NGO that will only make the problem worse, and then back to shopping.
It's not that there's something uniquely bad about us. It's just human, and any other intelligent creature would behave the same way.
If Trayvon Martin and his shooter were both black, we wouldn't have even cared there.
The unwanted will be removed to a remote location.
Machines will administer final IQ tests to ensure only the stupid are killed.
They will then be drugged with a cocktail of GHB and awesome.
Then herded down a path. At some point, numb and stoned, they will be led into a loud room.
The robot guides will be gone.
The floor will drop away.
Churning drums below will mash them into paste.
A few seconds of trauma and then nothingness.
A thick red paste flows out onto a specially designated fifty acres of desert, where the arid winds and blasting sun evaporate it.
Soon only a reddish dust remains.