> Sometimes, she gets worried about picking up passengers rated less than 4.8. Like a 4.79 is really low. I wonder, ‘Do I have to fear for my life with this person?’
I used to buy vintage cameras on ebay (not so much lately--no more room) and one of the things you quickly realize is that a 'seller rating' of less than say 95% means 'avoid'. The way the ratings are calculated mean that if they're getting enough dings to bring the score down even a few points, they're doing something wrong.
I remember in the early days of ebay before they had the official rating system it became accepted that you had to leave a review containing A+++++++++++ if the shipper did an acceptable job because a grade of merely A+ meant that you got the thing you bought but something wasn't great about the experience and anything worse than that meant the seller was a scammer.
I find it depends, a small seller can end up with a low percentage because one unreasonable buyer leaves them a bad feedback, but for large sellers anything less than 98% or so is a big red flag.