People can laugh again at the Helmet & Seatbelt law* too, but when $$$$ were attached to contrary behaviour, folks toed the line in droves (and the statistics improved along with safety measure "participation")
*Just to clarify: I am not in favour of over-legislation....only when it costs me $$$$ when others cannot exercize common sense
Maybe someday fines will have the same effect on cellphones/texting while driving, or even littering. I'm not holding my breath. Those aren't overtly visible if the driver is cautious.