Every neurotic hippy I meet claims to be allergic to sulfites and then they say this: "They don't add sulfites in Europe, I know because when we were in Italy we drank lots of wine and I never got a headache."
I've tried various responses but not had any success getting across that it is probably the high alcohol and residual sugar in their 9 dollar jug wine that is giving them the stateside headaches.
Anyway thanks for the link, maybe I'll just start handing out copies of the article to any future misinformed hippies.