In this post, I am not particularly picking on California as such, because the weird situation I’m about to describe apparently happens in many, or maybe even all states (see the Massachusetts example in the photo below).
On July 20, 2017, the California Department of Motor Vehicles published this on its Facebook timeline: ‘Don’t litter! The fine is $1,000, & you may be forced to pick up what you threw. Convictions go on your driving record.’ (Our italics, for emphasis.)
An attached photograph on the DMV post shows a picture of somebody dropping trash from the driver’s door window of a white car.