hm this si very interesting indeed, i remember a couple years ago i took a really good Biology class inwhich we studied virus and looked at HIV specifically. he told us an interesting observation about europeans, in genral about 5% of the population of europe is immune to HIV because they do not have a certain receptor site on there T-Blood Cells. the lack of this receptor means that the HIV virus can't actually attack the body, i dont know anyting about how they test for HIV i thought it had to do with TAKEING a blood sample and counting the number of T-cells in the sample, (i know thats how they test for aids BTW you only technically have Aids if you are HIV positive and your T-cell count goes below a certain number per a certain amount of blood) but yeah if they have a seperate way of testing this immuneity then all that i said above may not be the case may be resposible. and if thats the case there is no need to get a blood sample.
as for whether its right or not, well as a species each and everyone of us has a responsiblity to care for one another, its actually the biggest problem that i see in the world today everyone is about the 'i' 'i for me or i for my city, or i for my country or i for my region' no one cares about what better for 'we as a race and a species, we could be great but we are not because there are so many selfish people in the world. and if this guy is with holding blood i think as a people we should withhold all the things we do for him. dont take his tax money and dont give him all the civil services that he gets, let him do what he wants but show him that if he can be selfish then so can the rest of the world. the british governemt doesnt have to take his tax money and give him all his rights and privilages. i am sure that if that was done this guy would be ready to give his blood freely after a week. when he finds that he cause drive his car around cause he would be tresspassing on public property, or when he needs healthcare he has to pay a fortune just to see the doctor. or if someone robs him then the cops wont say anything cause the law no longer applies to him since he doesnt pay the people that are resposible for enforsing it. ui know it sounds harsh but its is even more harsh that he wont even give a blood sample if it means curing one of the worst deseases ever.