Yes, I am scared to start the trip before the passenger gets to the car, nor do I want to since that is the rules, IF the pax is new. There are a number of regular pax I have who think I should wait 10 or more minutes in their driveway. Since they are regulars however and I get a good amount of business from them, and one particular family I am thinking usually takes some pretty decent trips, so it's worth it for me to wait on them. Don't think just because you didn't start the trip you are going to avoid a bad rating. You could be deferring a bad rating. If it's a frequent Uber user, you could very well get matched with them again and trust me, if you have canceled and left them in the lurch, they will rip you a new rating should they ever get you again. If it were as simple as canceling and being pinged immediately and being right there at your next trip, then it might be worth canceling. But you've already invested the time to drive to them and another 5 minutes of waiting so if you cancel, you have to start the whole process over again. It's sort of a crap shoot. Wish Uber would charge more for waiting. In my area, it's .20 a minute.