Why would this cause them to rethink anything?
If someone trolls an order of thousands of something, a worker isn't going to just make that thing. I get that retail workers are treated like shit and are paid shit so have zero shits to give. If someone rolls up to the drive through window asking for their thousands of waters or whatever, the people working there are gonna escalate it to a manager or just tell the guy to go pound sand.
Anybody today can go to any drivethrough and ask for whatever and then simply drive away. I'm certain it happens from time to time, even from legitimate orders when someone discovers they leave their wallet at home. If it was a great problem though these businesses simply wouldn't order drive through service, or would require payment before cooking anything.