Two blood banks: the history of homosexual acts, imprisonment, prostitution, drug injection, risk of HIV, hepatitis, malaria, Creuzfeld-Jakob blood bank... and the regular blood bank.
Anyone who thinks the questions are a civil rights violation can draw from the first.
There is a real risk that the public will completely lose confidence in the blood supply system.
The government (as monopoly health-care provider) strongly discourages any individual blood banking. If you know you're going to have an operation soon, you can bank some of your own blood — and many people do. But, AFAIK, you aren't allowed to bank your blood for indeterminate times.
If the public loses confidence in the blood supply — people will demand the right to store their own blood. This would be hugely expensive & would create serious shortages of supply for the pooled blood bank. (All the supply is donated here — sales are prohibited.
How do the U.S. blood banks work, by comparison? Is there much banking of own-blood by individuals?