You have every right to rant. I would have called a tow truck, had it dropped off, demanded new wheels, new studs, and asked to Speak to the Owner of the dealership, as Per his Service department, just about creating a huge accident in which you and several others could have been Severly injured resulting In HUGE lawsuits and possible wrongful death suits..Then called Toyota and explained the same. Had my wheel actually came off, the police would have been called as it would have been considered a motor vehicle Accident on a public highway.. If a mechanic works on your car and a accident follows and he is the Cause, he is legally liable and so is the Dealership. In that case The tech was accountable!