I'm new here, so this is probably a silly idea; but...
I wonder if a page called something like [[wikipedia:Current edit wars]] might be a good idea. When somebody spots that they or others are becoming involved in an edit war, they could put a link on that page.
That way, "outsiders" with less of a stake in that particular war might be able to contribute some neutrality.
Just, y'know, a random passing thought.