I did not know stop signs were totally optional. Waiting in the car this AM while my youngest was getting a haircut (in Wpg), I watched traffic pulling up to a stop sign - a 3 way on a 4 lane residential street - and the only time anyone stopped was when there was another car that had right of way and was going to be crossing the path of the other. And even then it was hardly a full stop. Sometimes yes, but I'd say 95% of the time, no one stopped. Roll up, look, nail the gas. Helluva ticket factory if they wanted.
Had me wondering if I even stop at stop signs in the city...gotta pay attention...I guess.