Pingfah, walk away. You won't win. You know the expression about fighting the ignorant: they drag you down to their level, then beat you with experience.
Good advice Australis, I believe I will take it

They don't remember the incorrect information that WAS spread on the news, because, truly, people didn't KNOW how it was spread...touch? Air? Fluid? No one was really sure.
20 years of hindsight can be pretty good.
I recall yes, public information films assuring everyone that you can't get it from toilet seats and the like. I also remember that everyone was quite scared of it, the erroneous public perception that it was purely a "gay disease" hadn't even come to the fore yet.
Freddie Mercury's deterioration definitely started almost right after the Magic Tour in '86, I remember thinking that something looked not quite right when he did Barcelona, and that was only in '88. By the time the next Queen album was out it was obvious.