Re: No mention of...
Never having used Uber, I was unfamiliar with this, but having read the wiki, I can only say that I can't see much wickedness in this device, and that in their shoes I would probably do the same.
Uber claimed that it used Greyball to deny service to individuals suspected of violating the company's terms of services, such as people seeking to harm Uber drivers, disrupt Uber operations, or carry out law enforcement actions against Uber drivers.
https://en.wikipedia.org/wiki/Greyball