After 846 rides, I just got my first one star. Before I picked up my 2:30am rider, I noticed my rating was 4.95, then after I dropped her off it dropped to a 4.94 and a fresh 1 star. Once I saw her name, something told me not to pick her up but I figured she would be my last run for the night. I called support to see if it can be overturned... they are researching it. The rep said if it was because of something that was no in my control, they will adjust it. It pisses me off that we don't know who or why someone would do that, its just not fair. We'll see what happens.