I generally ignore hate, though it was helpful in assisting me to realize that it's almost always more useful to find things that people like about one's work and keep that, concentrate on developing that, than it is to try and discard things people say they don't like.
I do remember one of the most hilarious and earliest instances of hate against my comic Incubus Tales, years ago, was a person who was another comic creator and a mutual acquaintance of someone I knew at the time. He got so worked up that my comic had as many readers as it did -- or any readers, actually -- that at one point he said, and I quote "we have to get more readers than Incubus Tales!"
It's not as funny in text, but considering the empassioned way he said it, it was absolutely hilarious at the time. Imagine every instance of a supervillain character overacting in a film, and you'll come close to the way he surreally hammed it up while somehow taking himself totally seriously. It was amazing someone could be trying to act so belittling towards something they clearly saw as some sort of nebulous, weird threat by the fact of its very existence.
I guess that kind of sums up most of the hate for me that I've experienced: it's pretty ludicrous and almost never worth taking seriously, because if the best thing someone has to do is toss hate at someone they don't know because they didn't like a comic they read that was provided to them for free, they probably shouldn't matter a lot in your life. I have comics I dislike too, but I generally feel that unless I'm actually talking to a friend and the subject comics up, I have a lot better things to do than go troll the authors.