Anti-fan
Anti-fans' activities are very diverse. Anti-fans usually work and share their views in online website. They make anti-fan page. E.g. anti-fan website, anti-fan blog, anti-fan internet cafe etc. And, they criticise their target, spread a rumor about the target, and post malicious comments to Internet articles. Anti-fans also work when they are offline. They sometimes boo and jeer at their target and even start a movement against the target.