It should be possible to see how many users are watching a certain page.
Such a feature would be good for spotting vanadlism quickly, as ideally every
page will be watched by a large number of people and thus malicious edits can be
spotted quickly. If a page is not watched by (m)any users, then users can add it
to their own watchlist and keep an eye on it.
To prevent vandals hijacking this feature, it should be viewable only by trusted
users - i.e. administrators in the current scheme. Perhaps a colour scheme could
be used so that on articles with fewer than x users (20 perhaps?) watching, the
number is highlighted.
To avoid privacy concerns, only the number of users who are watching an article
should be viewable not a list of which users.
See also [[en:Village pump (proposals)#Who's watching]] for discussion.