First, the shark eating people hands is disgusting in the normal, literal sense of the word. I wanted to leave the site as soon as I saw it. I know that the idea is to be funny. There are probably people with a macabre sense of humor. To me, the anthropomorphized shark is down in the uncanny valley. You might lose users on it too.

Second, the fact that I have to create an account to do anything makes this site useless. I've already got accounts on sites that I don't visit anymore, and that I only visited once. I've reached a point that I refuse to get any more such accounts. If a web site is not going to give me at least read access to some of its useful comments, I'm not going to use it.