Hopefully she will settle down and learn something from you all. I owned a forum and had to learn to deal with trolls and bad behavior, I also have been in groups in real life where disruptive people had to be dealt with. NOT fun!!!
Here are two links that may help to deal with the on line trolls and the difficult people we meet in real life.
http://www.omafra.gov.on.ca/english/...cts/96-003.htm
http://www.teamtechnology.co.uk/troll-tactics.html