I haven't read all of the posts but the first thing that comes to mind is that the bible says not to eat blood. Transfusing blood for medical purposes hadn't even been thought of when the Bible was being written. The special regulations about blood were intended to show the sacredness of the life of the animals that were being used as food and to remind the Israelites not to take the killing of animals, lightly.
As far as the alcohol / eating blood analogy is concerned, It isn't logical. If you transfuse blood into the veins of a starving man, he'd still be starving because he needs food and the nutrients it contains. whereas injecting alcohol and drinking it, would have the same effect on a person who was told to abstain from it. If you eat blood, the body digests it however If you transfuse blood, it continues to be blood to do the job of blood is intended to do, within the body.
The comparison of drinking alcohol VS injecting it into ones blood, isn't a valid one. It sounded somewhat plausible when we were taught it as children or were new ones willing to limit our thinking abilities, but really what they are doing is comparing apples to oranges and in this case it's a deadly comparison.