Every time I get McDonald's for me & the Mrs I get an extra mayo chicken, eat it on the drive back home and litter the wrapper out of the car window so there is no evidence. Been doing it for years now.
@fesshole
There is a neat trick where you put a plastic grocery bag in your car, loop one handle over the gearstick, and BAM! A bag to put trash in! I doubt your wife will root around in the garbage, or that eating an extra sandwich is that big of a deal, but now you will be able to deal with trash while in your car without littering. AhMAZEing!!