A Collaborative world-building project? A big fat waste of time?

Well, it's something I think is cool anyway. I want to create a Wiki-style browser-based MUD, where the users create the content pretty much on the fly.� I have something online here.

What I'm really curious about is whether users will work with the system, or just abuse it.� I'm not really doing anything to control what people do, and if it works I'd like to keep it that way - I'll probably implement a 'rollback' button that you can push when you visit the site and see that it's been vandalized.. that would roll back the page you're on to a previous version (you could keep clicking it until it looked sane again).