Out-of-proportion responses by government cause panic and bad decisions by people. Just like someone who is involved in a hit-and-run accident who panics and leaves the scene of the accident. How much of this is caused by a fear of the draconian punishment meted out by government? Probably most of it. Otherwise, there is no reason to panic. Ask someone who has done this and see why they fled. I doubt they feared that the pedestrian's family would kill them.
I can usually count on a rational response from individuals. Even when I unintentionally have harmed someone. Give that individual the badge, though, and you create someone who no longer treats the "non-badged" among us as humans, but as "perps". Simply putting a bad(ge) guy into the mix escalates the tension.
Take the case of the hit-and-run. If it happens, you can count on the fact it was not intentional. The person who is at fault should take responsibility for causing harm. Even if it is the pedestrian who is to blame. However, if the driver has no license, or no insurance, has taken an allergy pill, or is even just behind on child support, the consequences of having to talk to a cop can destroy his life. His car may be stolen; he may be jailed. Someone who may desperately want to stay and help is prevented from doing so out of fear of inappropriate punishment.
The worse the law pollution becomes, the less respect I have for any laws. I suspect I am not alone.
