I think it is incredibly stupid to be in the car with a random stranger that you do not know, and be in the same car with him or her for possibly longer than an hour. You increase your chances of getting in a horrible situation. Uber's bottom line will not really change because if you take an analysis at the Craigslist killer.
Photo Courtesy: http://kalw.org/post/your-call-uber-economy-good-or-bad-workers