People (or a single person) who don't like ravers or any kind of kandi kid. They'll often times go to raves just to mess with them. They'll do things like needle people (aids pixies), pull pranks, try to get raves shut down, and in general, ruin things for everyone. They're often close minded, up tight, and negative.
Person A (at a rave): So, on my way here these people kept messing with me and some of the other ravers; they were saying they were going to try to get us shut down! They were really mean to me and some of the other people that I came here with.
Person B: Wow, what raver haters.