I think the point is that the themes support his message. I personally believe it's very possible that he had something to do with production, but I don't think finding that out is the most relevant thing. It's the message. Especially with V for Vendetta, I think a lot of things in the hoax could have been inspired by that movie without MJ having anything to do with that movie. Also, a lot of things in the universe just happen to align with each other without intentional planning from humans. Like the movie 2012, the main character's name is Jackson - that could have been a 'coincidence' in the literal sense of the word, but I believe all coincidences are planned by God or our subconscious minds, or a combination of both.