I really don't get this line of argument that regulation is useless. For example if you made it illegal for ex US gov workers to work at companies like these I would expect the vast majority to comply with this, so at the very minimum you would be limiting the available talent pool. The post several parents up talked about regulation for biological, nuclear, etc industries being effective, and although 'cyber' would never be treated in the same way, they're right, after all you don't see organized criminals running around with biological or radiological weapons now do you?