User blog comment:New Dalek Paradigm/Urgent - Regarding a New "Chat Rule"/@comment-5153769-20130403214039/@comment-4845243-20130403215606

And also, Wikia's Terms of Use say likewise:

You agree not to use the Service to: Abuse, harass, threaten, impersonate or intimidate other Wikia users; Post or transmit any content that is obscene, pornographic, abusive, offensive, profane, or otherwise violates any law or right of any third party, or content that contains homophobia, ethnic slurs, religious intolerance, or encourages criminal conduct; Attempt to impersonate another user or person; -- Obeying the ToU is not a matter of choice. If we want to use wikia we have to follow these rules.