I want to get people out of the habit of bringing food into my office when they come to talk to me.
My initial thought is a sign "Please stop bringing potato chips into my office and eating in front of me".
It seems excessively rude, but so is the behavior I'm trying to stop.
What's the best way of wording a sign like this? Should it be polite or aggressive?
Edit: If a sign is too rude, what should I say to the person? And what should I say if this person happens to be my boss?