Draco ripped out a piece of paper from an unknown book in the beginning of Chamber of Secrets. Hermione had a ripped out piece of paper talking about the Basilisk in the movie. <---- HOLY CRAP YOU GUYS
He's grown up in a world where he was told what was "right" and what was "wrong". And now he's finding out that things aren't what he had thought they were, and he's in too deep. He's a bit of a coward in the end, but he isn't "bad" necessarily.