This behaviour is particularly bad on a Q&A site that aims, as SO claims to do, to optimise for future readers (rather than the individual asking the question).

This behaviour is particularly bad on a Q&A site that aims, as SO claims to do, to optimise for future readers (rather than the individual asking the question). It leads to a page with a clear question at the top and a great deal of text below which is not an answer to that question.