This is the worst (although power tripping cops are also pretty bad). Imagine you are driving 5~10 mph over the limit for a long time, distracted by life and generally unaware. How many tickets do you think you would get? You were never stopped and corrected, how were you supposed to know?
Given the tendency of some courts in the SF area to make you pay the ticket before you can contest it (read this somewhere, not sure 100% on truthfulness of it), this sounds like a nightmare shakedown scenario.
Given the tendency of some courts in the SF area to make you pay the ticket before you can contest it (read this somewhere, not sure 100% on truthfulness of it), this sounds like a nightmare shakedown scenario.