Sometimes a user will ask a question, receive some answers, and then edit his/her original question in response to the answers, in an attempt to provide clarity. (One example is found here.)
There are limits, of course, on the edits that an OP can make to his/her question. For example, the OP's edit shouldn't change the original meaning of a question, particularly after folks have spent time writing answers.
What is the appropriate action to take if I feel that the OP's edits have changed the question's meaning? Is it okay for me to edit the question and remove clarifying statements that the OP has added? Should I reach some sort of agreement with the OP (e.g., in the comments or in chat) before editing his/her question? What if the OP's edits are an egregious case and clearly change the question's meaning--is different action permissible in that case? Perhaps the correct response is to flag the question?
I'm thinking about edits 6 and 7 made here and wondering if they were appropriate, but I'm also wondering what the correct procedures are in a more general sense. If I disagree with the edits that someone else made to remove the OP's clarifying statements, is it appropriate for me to roll them back?