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.The problem is that you may very well beat the charge, but you'll still get the administrative fun associated with the charge.
And this all assumes that the system plays "fair". Prosecutorial discretion, judge's interpretation, etc.