Is it possible for other users to edit StackExchange posts without the approval of the post's original author? I'm concerned that some of my posts (and those of other users) may be altered in ways that might not reflect the users' original intentions in making those posts.
For example, if I wrote a question called "How can I defragment the hard disk on Ubuntu", someone could edit it so that it would read "How can I defragment the hard disk on Windows?" In some cases, I think edits to posts could change the meaning of the text in such a way that it would misrepresent the author's intentions.
If other users edit posts without the original author's approval, can the original author at least revert unwanted changes that have been made?