No they didn't, I'll give you that. However, I'm sure we can take a guess and say it was. Come on... ground and home 50% of the time, all the time, always leave the trucks running.
You get what you pay for at Ground, although in some cases I suspect they need to keep the trucks running due to poor mechanical condition. Most of the time, it's a lack of professionalism combined with zero safety and security awareness.
I left my Ground Sprinter running constantly, with the drivers door left open. I'd stage the packages for the next stop on the front seat. I begged someone would steal my truck, but no one ever did. I kept all my personal things in my pockets. That's how little we care at my station.