I think you misunderstood me. I am saying the same thing you are saying - that having laws on the book won't prevent a bad thing from happening. It's a general

I think you misunderstood me. I am saying the same thing you are saying - that having laws on the book won't prevent a bad thing from happening. It's a general principle that laws that can't be enforced should not be introduced. On the other thing, we definitely do want to prevent certain bad things (malicious or accidentally wrongful) use of drones from happening. We do need to have a legal framework which would allow us to reduce the rate of such incidents - both by active intervention and by providing negative incentives to the wrongdoers. Registration does not accomplish this, nor would any law of the form "this is not allowed". As for technical enforcement - possibly yes, if it prevents a large percentage of undesired incidents. For instance, requiring GPS-enabled drones to avoid airports could alleviate a lot of concerns, and won't be harmful to the law-abiding consumer.