I too work for Dominoes, in Grand Junction, Colorado. Luckily I live in an area where the violent crime rate is very low, In the 2 1/2 years I've worked there I've never been threatened, robbed, or anything like that. But just cause it has never happened doesn't mean that I assume I'm safe. I take all the necessary precautions as a driver, and just in case, there is a 32mm wrench in my driver door.
But I'm surprised that you've never seen any mopeds just sitting there waiting for you. 3 of the 5 mopeds/scooters I own I found while I was delivering. And right off the top of my head I can think of 6 peds (only one is accutally running, the rest are just sitting) that I found while delivering. I admit, I have a hell of an eye for the things, but I guarantee that in your town, there are mopeds sitting in peoples yards, in plain view, waiting to be found/rescued/brought back to life.