I was employed by a taxi company for several years as a mechanic. I saw things like this happen frequently. One driver chased a passenger that ran and fell and was badly hurt. I would like to see cab companies go to accepting only credit cards which would pretty much curtail robberies, and/or when a customer gets into a cab, the driver should check his/her driver's license and relay all info to the dispatcher. This would not stop all such things from happening, but would stop a lot of it. Cab drivers have one of the most dangerous jobs anyone could have and anything that makes it safer for them should be considered. If the passenger does not have proper ID, let them walk.