Y'know, I've always felt like Draco was just too evil. Doing it for the sake of attention. Its a weakness and it makes the reader hope Draco can find some kind of goodness within himself. Its not that great a stretch to think Harry may be open to just that sort of expression of friendship. If that were the case, Draco could be accepted by Harry and the DA
(Then he would turn out to be a spy for the death eaters and status quo would be achieved)