Question Author
Oh, yes, ummmm, I see your point of view. Fair comment. There are more rude/unpleasant comments on Yahoo!Answers than there are on AB, so some people who use the Yahoo site clearly aren't bothered about changing their rude remarks, even though they have an "edit" button. But the general tone of answers/questions on AB is generally quite polite, and some ABers do really seem to be concerned if they make a mistake, so maybe an "edit" button here isn't all that necessary.