A hater, anti-fan, detractor or anti[1][2][3] is someone who enjoys writing, discussing, or (in some cases) making derivative works about a piece of media, but solely for the purpose of railing against or parodying it.
[6] It is common for large anti-fandoms to gather in groups, usually on forums and sites, to share their mutual aversion.
[7] Behaviours of some anti-fans include doxing, stalking, spreading rumours, stealing their personal belongings or information, abuse or physical harassment.
[citation needed] In 2006, an anti-fan of the K-pop duo TVXQ poisoned member Yunho with a super glue-laced drink.
[9][10] Instead of pressing charges against the anti-fan, he chose to forgive her, since the girl was the same age as his younger sister.