As a concerned citizen, I'd like to know the radio is set to a classic rock station.

Every summer, people leaving their pets (mostly dogs, but occasionally parakeets or ferrets or babies) in the car while they go into stores becomes an issue. This dog has created an elegant solution to the problem, simply by learning how to write, obtaining a sheet of paper and a marker, and putting up a sign indicating how comfortable he is. While it does suggest the keys are in the ignition, the sign is also a good deterent against thieves—who would want to be stuck with an uppity dog who insisted on 68F or cooler?

Sources: Redditor amsterdamned91