It seems a bit strange, but in some cases it can be convenient to flag your own post so an poster can ask for changes in his own post that he cant do anymore, think of rename of change the tags the post has after the 10 minute limit we impose.
Now they respond in a feedback topic with the requested changes because they are unable to flag their own post.
it would be nice if they could just flag their own post and add the requested changes so our team members can process this.