They are sociopaths who need control and the last word. And are so insecure about their own beliefs that can't tolerate any idea other than their own.
Geez who would block a sweetheart like you?
oh flibberflabber! :D
Those wussies must be really pathetic to deal with in real life.
I know, right? My favorite is when they call me a bunch of names, then block me.
Yeah, that's my favorite.