Hey everyone else seems to demand tips these days. Drives me nuts to tip van drivers who probably making more than I do. Drives me even more nuts when I see tip jars at fast food joints. Tips are to encourage the worker to perform above average service and be rewarded accordingly. You shouldn't be tipped just for doing your job (except for wait staff and the like who are only compensated by tips, then the standard 15% unless you do something impressive or tremdounsly stupid).