Last weekend I traveled out to San Francisco with my brother. We had a rather enjoyable stay at the SFO Airport Hyatt Regency with the exception of one issue. It has long been my policy to not tip Hotel Shuttle Bus Drivers as I was taught this by my travel guru father and other travel happy friends. However our driver this weekend seemed incensed by our refusal to tip him. He stood at the bottom of the stairs with his hand all but out. Now we had carried our bags on ourselves and this driver had picked up a friend of his and dropped him off in a remote industrial area so there was no reason I saw to give him any money. I thought nothing of the incident until we had to ride the bus later, he refused to get out of his seat to help us with our luggage and he spent a good deal of time glaring at us. While we alighted from the bus at the hotel the third time I heard him muttering. Is my policy of no tipping incorrect? Should I rethink my staunch refusal for handouts?