What to do about man who whistles while he works?

There’s a guy in our shop who whistles almost nonstop at an ear-piercing level. His co-workers have asked him to stop, and then they asked me to ask him to stop. When I did, he said he had a right to whistle. Now whenever he sees me coming, he starts to whistle really loudly. This is causing a lot of tension in our shop, and a lot of his co-workers are getting very aggravated. I don’t believe this calls for any kind of formal discipline—that would be like disciplining someone just for being a jerk. Any ideas on what to do to get this guy to cut out his annoying behavior?—DS, Fla.


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