Next time, quote the whole passage in context. Here, I'll do it for you, and this time, I'll put something different in bold to show you the important bit you chose to ignore:
In a consensual stop, the person stopped has every right to terminate the encounter; in the state of Washington, he can even tell you to "go f*ck yourself," and you can't do anything about it.
Your attitude is exactly the one I had in mind in posting the article. Yes, of course you can still intervene in a violent crime; suggesting otherwise is either being intellectually dishonest or just plain stupid (my money's on the former). This is about A) avoiding force where it can reasonably be avoided, and B) remembering that "contempt of cop" is not a crime.
Well thank you for posting this for me and others of my mindset. Your thoughtfulness and humility are beyond measure Dave.