I think the zero-risk approach common nowadays is insanely corrosive to democracy and freedom. If a million people fantasise about shooting the sheriff, and one ever goes on to do it, I don't believe avoiding it warrants creating an apparatus of mass surveillance. After all, if people were really serious about zero murder, the only practical solution would be to lock up everyone. Some (most?) tradeoffs have exponential costs at the limit and we/lawmakers should recognise that.