I don't really think so, I'm not much of a hateful person. Though if I hear of comics that are notorious for being "bad", I will give them a read. The same goes for fanfiction. I like to be able to form an opinion of my own before letting a reviewer or another reader form an opinion for me.
I'm currently reading Sonichu out of sheer curiosity, and also My Immortal. These are both apparently very popular works that I heard of from my friends, and I simply had to see for myself. But I'm certainly not one to hate on others or even leave hateful comments for that matter, unless said person is just being an asshat.
If you are being an asshat or a horrible person, I will roast your ass to shreds. Other than that, I don't really have time to read something I "hate". That's time I could be spending reading good comics, especially new comics that really need the attention <3