Automantic, I agree that one should edit posts to remove obviously objectionable material once you can see it in an actual thread instead of the little tiny edit window. I am glad you do. So do I.
Complete deletion of posts would be A LOT worse. And because of a software glitch, if the thread-starter deletes his post, the Whole thread and everyone elses posts in the thread Go Away. That is Real Bad. So nobody can delete whole posts.
But I do feel if you walk away from the post-edit mode, giving someone enough time to read and respond to your post (maybe only for a few minutes), then you should leave the text where it is and take the heat (if any).
BTW: in my last post to Brian, I was Playing. I hope Brian does not take offense (the check is in the mail Brian).