So I guess the cops can see your car idling on your property and come over and write you a ticket. Cool.
Looks like there's a law in Ohio where you can't leave your car unattended if you don't turn it off, lock the ignition, remove the key, set the parking brake and turn the wheels towards the curb.
http://nbc4i.com/2017/04/21/chilly-justice-michigan-man-ticketed-for-warming-up-car-loses-case/
sleep soundly, citizen.