No. Fanfiction should not involve such disturbing and inappropriate themes like molestation. It goes against basic ethical and moral standards.
Definitely not. The idea of molestation is a very serious and dark topic. Fanfiction is supposed to be a form of creative expression within the boundaries of respect and legality. Such a concept as 'draco malfoy is molested fanfiction' is completely unacceptable as it can be very traumatizing and offensive to readers.
It is not appropriate at all. Fanfiction communities usually aim to promote positive, creative, and healthy interpretations of the original works. Molestation is a form of abuse, and including it in fanfiction is not only unethical but also can create a very uncomfortable and harmful environment for the community members. We should focus on creating fanfiction that respects the characters and the values of the original story in a positive way.