i do the same.. i don't want to spend my time arguing with people who are just arguing in bad faith, and i don't want to spend time arguing with people who want to nitpick and tell me what i can and cannot say according to their own personal opinions
the internet is a big place with so many possibilities.. I'm not going to feel bad about blocking people at all
edit: having said that last bit i realize I'm guilty of nitpicking things that annoy me but i never tell anyone they cannot say this or that thing