One time on Reddit I said guns were bad, and some nut job looking for a fight tracked me down because my username (at the time) was able to identify me with enough effort. They threatened lots of stuff on various communication methods. Fortunately, I had just moved states, so all their efforts were concentrated on the wrong area. So now I’ve made an entirely new identity for social media. I never post personal things, like where I’ve been recently, or even simple things like places I like to eat. On one hand, if it were not anonymous, I would have had a better chance of identifying them. On the other hand, I wouldn’t have been able to make a new identity.
I’ve thought occasionally about how there could be real accounts, but there are so many dangerous reasons for it that I don’t think it would end up working in the end.