I took a ride from love field AP to DFW AP. As usual, I take 35 to 635. I check the fare details and uber subtracted a mile and graphed that I took a different route. The adjusted route only cost me a dollar less, but this is plain illegal. They could at least graphed that I took actual roads...

http://www.cnbc.com/2017/03/03/new-york-times-digital-how-uber-used-secret-greyball-tool-to-deceive-authorities-worldwide.html