Forum:Article writing/editing and comments writing policy

I need some help. The wiki needs some structure, and a policy for writing/editing/commenting is a factor in building that. Can you suggest rules on when to undo and/or remove bad edits and ill-intended comments? How do you define ill-intended comments? Because we might have different standards on what classifies as a curse or not. Explicit cursing is definitely prohibited. How are we gonna judge if an edit is good?