Tumblr hate blog

For the last while now, I've been noticing that a certain blog on Tumblr has been posting about me. Bad things, degrading my art/characters. It's not criticism, it's blatant harrassment. I've reported it several times and still haven't heard back.

who would do that? and why? on a lighter note, you must be famous that someone blogs about you. Haters mean that they envy you.