In my opinion, a club should only be about positive things, things that people enjoy. I've seen them for different versions of Spyro, I've seen them for Land Before Time, I've seen them for different characters, for different pairings, etc.
Such clubs create positive feelings that feel better than the hate created by hateclubs. Hateclubs create a hateful atmosphere, bashing something they don't like for no good reason. I regard people who create such clubs to be immature and having too much time on their hands. If they don't like something, then they should avoid it and focus on something they do like. By creating a hateclub, they're giving attention (even though it is negative) to something that they hate, which is wasteful.