Getting idea from EP's thread.... I think all HIV/AIDS infected humans no matter what country you live in should be tattooed with an infected logo around the groin area. Kinda like a biohazard/nuke type logo that clearly marks infected HIV people.
The problem with this particular idea is that most people who have AIDS don't want to take you to the grave with them. The AIDS problem is largely attributed to the people who have HIV and don't know it. You kinda have to know it before having the biohazard logo branded to your forehead.
Might want to do it on the forehead, after all one can get infected from above the waist too. Needles come to mind.