Here's a new PASSENGER SCAM that I suspect is happening.
Imagine a rider who has a fairly large group and maybe some luggage. They aren't sure they can fit into an UberX (or UberBlack). They are too cheap to order the larger size, i.e. UberSUV.
So they would request an UberX, and when they are matched up with a UberX, they would cancel. Then they try again...until they are matched up with someone with a larger car.
UBER! You hide all kinds of pax information away from us. Maybe you should hide our vehicle information from the passengers?