If blood factions are allowed, then it must be OK to donate blood. But I know its not OK to donate blood, if I was caught at the blood bank, I would get DFed. Yet there are some JW's who because of some illness use blood products made from blood factions that are "approved" by the WTS. Luckerly not everyone in the world are JW's because if they were, then those JW's who need those blood factions would be dead.
explain that to someone