I stopped using StackOverflow a year or so ago, when I was astonished to discover that people can edit your questions.
I accept that this sometimes may be necessary, but I asked a question which was then edited to be a different question, so that the answers I got were entirely useless.
I understand the need for moderation but surely they should not be able to change the meaning of what you posted.
If that happens, you revert the changes. Editing to change the nature of the question is definitely not a valid edit. If people do it consistently, a mod should intervene.
New users can make suggested edits, which are sent into a moderation queue before being applied. Once you reach a certain level of reputation (2000), you can edit other users' content without moderation.
I accept that this sometimes may be necessary, but I asked a question which was then edited to be a different question, so that the answers I got were entirely useless.
I understand the need for moderation but surely they should not be able to change the meaning of what you posted.