NOOO! This ruins the whole experience. Right now Uber is a convenient alternative to Taxis in (large) part because there is no tipping necessary. Once tipping i

NOOO! This ruins the whole experience. Right now Uber is a convenient alternative to Taxis in (large) part because there is no tipping necessary. Once tipping is required you have to go through all those mental gymnastics all the time: how good a job did this person do, will I ever want them as a driver again, if I leave too low a tip will I get lower rating? Tipping will take Uber from a nice no-personality no-thought experience to an annoying "do I want to deal with all that" mental decision each and every time.