Emergency landing if a pilot smokes a cigarette ..... really?
Delay and inconvenience perhaps 200 passengers, 200 passengers that ultimately pay your wages, increase fuel, navigation and landing charges that could ultimately put an airline out of business and put yourself out of a job, and having emergency landed, perhaps in the middle of nowhere, hotac and feed perhaps 200 passengers whilst a replacement pilot is transported in to take crew rest before operating, yes really?
P.S. Would the referred to emergency landing be a Pan or a Mayday?