I'm afraid not. In my experience, though, this isn't really needed.
I've never found people putting in MORE information than they were supposed to, only people who didn't put in enough information. If a Webeditor knows he isn't responsible for the metadata I would be surprised if any of them ever attempted to put information in those fields. And, if they did, the Senior Webeditors are still responsible for the metadata content and could either accept what was entered or put in their own data if not satisfied with what the webeditor had entered.
cheers,
doug.
MVP 2007-2009 -
Percipient Studios