Uber drivers seen day-trading!! what about your passengers

It has been seen in Mumbai/Delhi cab aggregator Uber's drivers are literally making more money by day trading in stocks rather than servicing customers.Looks like this has two major concerns.

First this exuberance may mark the end of bull market in India. This has been seen in the past during 2008 global downturn when weak hands enter the market , strong hands gradually exit the market and the retail guys are stuck at sky high prices.

Second how can they reject passengers cab request just because they are day trading, we have seen instances where they turn off their GPS tracking systems just to avoid bookings.Not sure how the cab aggregator will handle the situation