Fisher next placed a small, weighted chain on the steering wheel, to simulate the weight of a driver’s hand, and slid over into the front passenger seat without opening any of the vehicle’s doors, because that would disengage Autopilot
I mean, I guess this counts as "tricking" the car, but there's definitely a line somewhere at which point this becomes a Tesla-hating non-story. You could also put a brick on the accelerator in a normal car and crash yourself that way, but so what? Any safety system can be worked around by a sufficiently determined person.