Not the US, but I know someone whose name ended up in a list being spread around among rightwing groups as a "left activist" because he was on FB a lot replying to anti-refugee/anti Muslim comments trying to educate the posters.
Imagine having your face online, plus the resources of the police...
"nothing" happened, if you consider worrying that some nutjob Nazis might show up at your door or jump you when you walk to the shops, so that you have to look over your shoulders and be paranoid, as "nothing"..
Imagine having your face online, plus the resources of the police...