@nprofile1q... have you looked at videos of Waymo "stacking"? It's hilarious. One person stands in front of the vehicle and then someone else goes around putting post-it notes or taping paper in front of their sensors. The car is effectively disabled at that point.
My wife used to use a similar technique using post-it notes to disable automatic flushing toilets in public bathrooms when our kids were little because they were scared by the random flushing when the sensors didn't properly notice them.