I Will Not Hesitate To Block You If You Are Not Respectful

Well I just blocked someone on here. It's not something I like to do and it's only the second time I've done it but this person is the most disrespectful, mean, and judgmental person I ever met. She attacked me last night on a post for no good reason at all and it wasn't the first time she did this. She jumped all over me a few months ago about something else and had to actually apologize to me because the author of that post kinda defended me. She also made a sarcastic comment on an innocent post I made a few weeks ago. I have no idea why I was being targeted but it bothered me so much a few months ago that I deleted my profile (I was also going through some stuff and she was not helping). I ruminated about it all night and stopped commenting on posts for "fear" of being harassed. I shouldn't have to feel like that on a social site designed to be supportive. So I decided to block her which I didn't want to do because I think that's what she wanted. She seems to have so much anger in her and it makes me sad.