Drivers can and should prefer passengers with a higher probability of being "good" customers. Greyball seems to be a clever tool which attempts to predict the

Drivers can and should prefer passengers with a higher probability of being "good" customers. Greyball seems to be a clever tool which attempts to predict the good-ness of potential passengers. The unethical piece comes in to play with the heuristics injected in to greyball. (kinda makes you wonder if "grey" moniker refers to the ambiguity which comes with the territory of rating people)