I found this to be interesting, even though the proponent is denying the charge:

The leader of a conservative Christian lobby group appears to suggest that gays should be required to wear warning labels, although he denies that was his intention.

“We put warning labels on cigarette packs because we know that smoking takes one to two years off the average life span, yet we ‘celebrate’ a lifestyle that we know spreads every kind of sexually transmitted disease and takes at least 20 years off the average life span according to the 2005 issue of the revered scientific journal Psychological Reports,” Rev. Bill Banuchi, executive director of the New York Christian Coalition told the Mid Hudson News.

The journal regularly publishes articles described by many mainstream psychologists as misleading and faulty.  The homosexuality morbidity study was conducted by the conservative anti-gay Family Research Institute.

“Fun” fact: The Nazis made homosexuals where a pink triangle in concentration camps. 

UPDATE:  Wonkette has the idea for a perfect label: “Warning: May result in a Judy Garland fetish”