Worse yet, the OP says that the driver picked up other passengers late as result of the delay. So it wasn't even as if they were already on the van and said that the delay was okay with them. The OP says that they all made their flights, but how would the driver have known that they would, if they weren't even on board yet? I doubt that the driver phoned them all to ask. I know that if I were on the sidewalk at the appointed time, waiting for an extra half hour and not knowing when or even whether the van would appear I would be 1) a nervous wreck, and 2) pretty damned angry. By the same token, if I were that late for the van, I'd make sure the driver knew to leave rather than wait for me.