Haha, a colleague of mine in med school described the conundrum of telling a diabetic patient to improve his diet, then running into him in the line at a fast food burger place and wondering whether to comment on it at their next appointment. He was quite upset, whereas I belong to the school of thought that people are adults (or sometimes selfish fat ham children) and can be dumb and destroy their bodies by not listening to my advice - as long as I got paid for it, I don't care. I'm pretty sure half my income comes from hams and their shitty decisions.