Genuinely I don't understand how people post under their own name or connect their accounts to their real identities at all. I learned early that my opinion can piss people off (even though I think I'm pretty milquetoast to be honest), and there are people with enough time and hate to make their disagreement with you impact you personally.
I started using a pseudonym about the time my consulting site got taken down by a DDoS attack because I voiced an opinion about a presidential candidate who's name rhymes with Meorge Mush Munior. People are awful.