Actually, the gays who DO KNOW they have AIDS continue to share it too. Some gay men have actually contracted HIV intentionally so they can receive all the free stuff AIDS sufferers get...housing, food stamps, free medical care, etc . Many medications available now that ameliorate the symptoms so guys are living decades with AIDS without feeling as bad, apparently, as they'd feel if they actually had jobs.
I know this is true because I lived in SF for ten years and knew gay men at school and at work who told me.
I don’t doubt you one bit!