Have laws stopped music piracy? Have laws stopped copyright infringement?
Both have happened at a rampant pace once the technology to easily copy music and copyrighted content became easily available and virtually free.
The same is likely to happen to every technology that becomes cheap enough to make and easy enough to use -- which is where technology as a whole is trending towards.
Laws against technology manufacture/use are only effective while the barrier to entry remains high.
> Have laws stopped music piracy? Have laws stopped copyright infringement?
They have a large effect. But regardless, I don't see the point. Evidence that X doesn't always do Y isn't evidence that X is ineffective doing Y. Seatbelts don't always save your life, but are not ineffective.
There's lots of evidence of our ability to control the development, use and proliferation of technology.