I believe so, but it would seem as though they went overboard with it and it became yet another source of discrimination rather than actual safeguard.
They run tests on all blood prior to freezing/administering it anyways.
And smurfing stop talking of moles. I've never heard of anyone getting one, and after almost 4 years of donating, I have not grown a mole. This thread is about donating blood, not how a small physiological difference has been rumored to happen.