Tipping isn't required. Neither is picking up a passenger or giving them a good rating. 5 star passengers always tip. 4 star passengers don't. The only control drivers have in this situation is to educate passengers when possible (which is VERY frequently) and to rate passengers as you would want the next driver to see. This evening I took 5 rides between 6 pm and 8 pm, all fairly local and under 8 miles. The payout from the 5 rides was $33.93. The tips from the 5 rides came from 3 of the rides and totaled $14.00. the rides: 1. 2.5 mile 1.5 surge no tip, payout $3.79 got rated as 3 star 2. 6.5 miles, 1.6 surge, $6 tip, payout $9.64 got rated as 5 stars. 3 passengers. One of the passengers wanted me to settle a disagreement with one of the others. She said that she always tips and thinks that it is good form, the other thought that tips were included. I explained the situation and now hopefully the other two are better educated. 3. 7.1 miles, 1.8 surge, $5 tip, payout $11.40 got rated as 5 stars. 4. 6.7 miles, no surge, $3 tip, payout $6.20 got rated as 5 stars. This one was interesting because one of the passengers said to the other that the tip is automatically setup on the phone. I interrupted and told her that there was no automated tipping mechanism with Uber and that if they wanted to tip it was typically done with cash. They were happy to tip. 2 more people educated. 5. 2.7 miles, no surge, no tip, payout $2.90 got rated as 2 stars. This was particularly annoying because unlike passenger 1 who was some kid probably getting to his minimum wage job, this couple was affluent and going from an expensive neighborhood to a very expensive steakhouse. I'll probably go out after dinner and see what the evening has in store for me. I was very pleased to experience more people tipping and more people discussing tipping. I think we are making progress.