I came across this post today:
The user deliberately deleted a large chunk of his/her own post, making the question unintelligible before the edit was rolled back. What is the community policy on such behaviour, especially if the user is recalcitrant, or makes new accounts to do this again and again? I believe such users might have motives that are not good (e.g. cheating and trying to cover their tracks). Should new users need community approval to edit their own posts?