In WA there is case law established that OC, as long as it stays in the holster, on your belt, etc. is NOT a violation of anything as long as you are otherwise not restricted from possessing a firearm. No terror to the public or public nuisance or anything like that. Do all of the LEO know this? No, but more and more are becoming educated.
As to CA, while in the short term the OC demonstrators may have made things difficult for residents, the new even more restrictive laws that the CA legislature passed may have just shot themselves in the foot. The restrictive "may issue" nature of the populous counties was upheld by the courts as not restricting 2A rights because OC was legal, and therefore another method of exercising the right to bear arms was available. Now that no OC is allowed, they should be forced to change to "shall issue". It just may take some time in the courts.