I would feel safer with only password protected editing. A filter might help against wiki-spamming bots, but not against people who just want to disrupt. And someone who managed to hack into Tower of the Sun a while ago obviously found it worthwile to put the site in such a state that it had be to be recovered from backup. (This person also left a threat that Project Aon was the next in line, so he/she/it apparently had at least some "domain knowledge".) -- Thomas