By Solomon Israel, CBC News Ottawa, March 8, 2017
It's called Greyball: a secret method used by Uber to track and evade unfriendly authorities in cities around the world.
The ride-hailing service won't confirm whether it used that clandestine tool to deceive regulatory and law enforcement authorities in Canadian cities.Still, Uber has publicly acknowledged that it used Greyball in major cities across the world including Paris, Boston, and Las Vegas.
http://www.cbc.ca/news/business/uber-greyball-canada-1.4013711