Nope, over here, if one sees a pet locked up in a car on a hot day with windows cracked open or not, the cops and animal control are usually called. I used to just put a little postcard under their windscreen/shield wipers which the Humane Society sold, but here in the high altitude the sun is even stronger and more deadly to children and pets. There is no time to mess around with notifying the store and hoping the person who left their pet that way will care enough to acknowledge the call.

There's a good chart, lower down on THIS PAGE, which shows how quickly a car becomes an "oven;" even at an air temp of 82 degrees, it heats up to 119 in a car after just a few minutes and that chart is for sea level. In some places it is even illegal to leave your dog in a hot car, just as it is for children.