Something incredibly stupid happened to me yesterday night.
After terrible traffic jams for a Saturday night, I was late meeting some friends at a place a I had never been to.
Rushing out of the car, guess what? I locked the doors but I suppose I never pushed to power off button when leaving my seat. (back in the old days, removing a key from the car naturally shut off the engine and power)
When I came back a few hours later, I could easily find my car on the parking lot: it was the only one with the lights on and the engine running. And the doors were still locked.
I managed to burn the remaining 10 miles of battery range through the evening plus some gas sitting perfectly idle on that parking lot.
Did the car warn me when I left ? No!
Did the car complain when I locked the doors ? No