Deathphoenix said:
You'd probably need to have a small team of volunteers willing to act as moderators for each article (of course, people would be moderating much more than a single "protected article"). The current {{protected}} system is good for protecting the article so that only admins can edit it, so if the moderators were admins, that would work.
Create content moderators and you create a point of weakness. The best safeguard of content is verifiability. The existing dispute resolution process can deal with people who repeatedly make unverifiable edits.