The wikia staff sent me this regarding Katydidit:
Sannse Carter Cushway, Aug-01 10:33 pm (UTC):
Thanks for writing, Katydidit has been banned from Wikia.
I would also suggest that anyone who has had problems with this user contact their local authorities - they are the best people to help. You can also report problems anonymously via http://www.cybertipline.com
It's also helpful for the chat admins to remind all users that they should block private messages from anyone acting badly in chat. They can do this by clicking the user's name in the PM window, and selecting the option to block messages.
There's a good resource for helping everyone know how to be safe online at http://www.fbi.gov/fun-games/kids/kids-safety] ... it would be great if chat admins can make sure that that page is shown to others in chat.
Thanks again for letting us know of this issue,
Sannse Carter Cushway
Wikia Community Support
Mak23686 03:51, August 2, 2011 (UTC)