I don't know about the other sites, but SO sees a good number of occasions when new users (invariably rep 1 etc) post questions as answers. Sometimes the question is completely unrelated to the topic; sometimes it is related, but phrased as a new question.
Such questions/answers (quancers?) don't get responses (other than maybe a comment a few hours later, and maybe a downvote). So certainly not good responses that are going to lead to a positive warm and happy feeling.
IMO we need to help new users - make it very hard to do the wrong thing; but without making life a pain for the established core of answerers.
So; how about, until a new user has either posted a new question, or posted 5 answers - they see an extra block of text in the "add an answer" area, making it obvious how to ask a question if that is what they intended?