For Starship, they have a remote voice link to the thing, and if someone is messing with it, central control can yell at them or send siren sounds. It locks remotely; people can't just open it easily. Someone could steal the whole thing, but its location is known and it has already sent video of people approaching it. Besides, stealing from it probably just yields a pizza, a Chinese dinner, or some random groceries.
Redwood City is a good test site for this, because it has both good and bad neighborhoods close together. They can find out how much people will bother it.