Luckily, I have a cherry ‘05 F350 turbo-diesel that doesn’t require DEF. I only put 30 miles a month or so on it and live in a RV park where everywhere I need to go, I can get there by golf cart.
I have it because in event of a hurricane, it’ll pull a 16k lb. 5th wheel.
A LOOOOOOOONG ways.............................
Couldn’t a person put some DEF in the DEF tank, and then sever, somehow, the connection between the tank and the exhaust system, allowing the sensor to see a “not empty” tank, allowing you to run your vehicle?