Let them have their friggin’ free doughnuts. Ban them so they can live to 100.5 instead of 100? That's what gets me too. If you look at the effects that various lifestyle modifications have on lifespan, the benefits are often surprisingly modest.
Obese people live only four to six months less than monastic Pritikin-dieting food Nazis. Even lifelong smokers have only about a year and a half less life expectancy than non-smokers. And by the age of eighty or so, the damage has been done, and enjoying a donut or a cigar or a glass of wine every day is not going to affect your remaining lifespan in any meaningful way.
Leave the old codgers in peace, I say, and let them choose for themselves whether or not to have a donut.
Right, and also its not that simple in the first place. There are lots of other forces. For instance a year ago this woman in the neighborhood was hit and killed while out running in the predawn darkness. Nobody was charged as it was deemed an accident. The paper said she was very much a health conscious person who very much promoted fitness. It said she had a husband and a baby girl and a toddler girl. One wonders if perhaps she had been home that morning eating bacon and eggs and smoking a cigarette would she have lived to see her daughters grow up and her husband have his partner. One never knows.