Right now people over-write each other, edit unknowingly when others are editing, etc. Could we improve the edit-feature maybe to lock the question while it's being edited, and show who is currently editing it? Perhaps give the edit 10 minutes before the lock is lifted, and the user cannot touch the question for another 10 minutes or so.
While it is possible that some people would attempt to lock themselves "in" to prevent others from editing the question, they would first need sufficient reputation (unless they are the author), and their lock will expire after n-minutes. Furthermore, no 1 person is allowed two consecutive edits (within n-minutes?).