Just wanted to say that it is sad that they allow ignorant people to work out in public. Please, please don't let this keep you from trying to do good works in your life.
As an aside, is there any sort of appeal process? From a strictly practical standpoint, your blood is rare and needed. You would think that they could (assuming donors would be willing) have a regular testing program of sorts, where you agree to get tested at "x" interval and report regularly. If I were a parent of a new born, I think if the option were death for my child vs a one in a million chance of HIV,well what do you think?