Stop and think for just a second. I would suggest that before being stopped, questioned etc. one would contact the prosecuting attorney in the appropriate jurisdiction, and apprise him or her, of the RCW and what the outcome could be as the result of an improper / illegal act by one of their officers.
The officers have a defense of sorts, as they are somewhat protected by the idea that they "acted in good faith"
Trying to educate the police by dealing with low level supervision, or even the Chief is counter productive.
Deal with the person who is responsible for the legal PROTECTION of the city or county. Let them issue training edicts to the police. Remember doo doo runs down hill.