I find the argument that a doctor m might choose not to save a life because someone else might need the organs utterly bizarre. Let's not forget that a&e doctors generally don't have a list of patients desperately awaiting organs - they are there to save lives, not end them.
I also disagree with this argument that people would not have wanted to donate a liver to George Best. George Best, and other alcoholics who end up screwing up their livers, have to be clean for a period before they are allowed to receive a transplant, and to my knowledge they would be tested for alcohol during that time. So at the time George best received his liver, he was clean. Or should we live in a one strike and you're out society, where your mistakes should go against you for the rest of your life? Yes George best fell off the waggon and died as a result, but there was no knowing that that would happen.
where do we draw the line at who should, and who shouldn't receive certain medical treatment? Surely if someone wants to be helped, they should be given that chance?