Wary of wikis

I'm still not sure about wikis. It's back to that thing about the veracity of information. I guess that's a problem with a lot of the web. I suppose it's really an education thing, about suggesting people use multiple sources regardless of what format they take. Wikis seem to have a lot of potential in terms of sharing library information such as booklists, reviews etc. I think you'd have to be careful to use them for information that doesn't date as if could be a full time job checking details, following links and removing outdated information.