It also implies that the restaurant has to walk out to the car and place it in the car too. They aint gonna like that. Although to be fair most restaurants already hate the drivers that physically come into their restaurants and don't obey the rules.
Use stolen CC on App, pick up somewhere seedy far away from where you live. OP is right, this will be abused. What is keeping people from dumping weird things into the truck after picking up their $15 cheeseburger?
"When Waymo arrives, open the trunk with your DoorDash app and grab your items."