A colleague continually drones on about how he has no energy without drinking at least five cups of caffeinated coffee a day. The rest of us agreed to only make him decaf and not tell him. It's been three months and he hasn't noticed.
@fesshole no headaches? I went cold turkey on coffee a few months ago and had splittling headaches for two weeks until I gave up and settled on two cups of coffee a day (down from 5-6). Other people reported even worse withdrawal symptoms, such as vomitting.