While I agree with the premise of this post, they could / would charge a person even without this law. You can't film or photo someone without their permission when they are not in a public place and have an expectation of privacy. This law just makes it clear that this applies to drones as well. As well it should.
But a agree 100% with were you are coming from when something like an illegal law makes you guilty until you prove the law is illegal or does not apply.