What I've seen a lot of is drivers marking my ride as complete when they get within a few blocks of my destination. I originally wrote it off to the driver trying to earn a better rating in light of heavy traffic or navigation difficulties, but it seems to be becoming more routine. In a few cases they've accepted another fare before they even drop me off.

Recently I saw this for the first time on a trip to SFO, which actually makes a lot of sense - since its a fixed price, they're not giving anything up by marking my ride complete as soon as they hit the exit for SFO.