If the courts won't inflict deterrent punishment, it's up to the cops to inflict it.
How about using a water canon that sprays a liquid with the noxious smell like a skunk or butyric acid (vomit)?
All the way home, they'll be smelling like skunks or puke, possibly even puking themselves. Now that's justice.
The US Constitution forbids cruel and unusual punishment, but it does not forbid cruel and unusual discomfort.