These streets are temporarily closed to thru-traffic, likely until parking lots start opening up again in Phase 3 of the Safe Start Plan, and support social distancing to and at destination parks. Thru-traffic is people driving from outside of the closure to a location beyond it. Local access is for people going to a destination within the closure, to access their homes, relatives, jobs, etc.
As a local business owner whose patrons use the surrounding streets to access my business, and as someone who must also park on these streets that my taxes go to pay for, I find your passive aggressive & continuous note leaving ridiculous and uninformed (see above). Do you have so much free time on your hands that you can’t think of anything better to do? Because believe me, if you need something productive to do with your time, I can send you a list.
Second, you’re creating more litter with your misinformed measures as I have seen these letters strewn in the street; I have thrown them away for you. Your misplaced sense of entitlement is all around silly, quite annoying, and creating a mess. Find a better use of your time.