The name "Reno" put me off, but that's my baggage. Good for her. It's an interesting example of "taking the law into your own hands."
Leaving the engine running for the A/C? I guess it depends on the weather and the vehicle. My little Subie station wagon with maybe 50% glass sure gets hot quick if it's parked in any kind of direct sun.
I put up with it, but I've thought of using two keys, one for keeping it running while locked, one for getting back in, but haven't actually done it. (And this is just ordinary $7.00 key shop keys, of which I have extras anyhow, not the $100 electronic ones.)
Just seems awkward, so as mentioned, I just put up with the hot car on my return. I do try to park facing away from the sun if it's convenient, just to keep the driver's area cool. Ish.
Terry