Yeah, it's a major scam. Some cities are now ticketing for street sweeping on streets that have no signs and for No Parking in areas that are not marked no parking. And you are screwed because even if you can prove that the ticket was unjustified and issued in error, they blow you off. You can send a slew of photos showing that nothing was posted, and they basically reply "Tough sh*t, you either pay or you can't get your car registered." They essentially force you to go the full administrative route and forfeit a day's pay and fork over the fees. They pick your pockets under the guise of authority. It is legalized theft.