Regarding the actual eating of blood: Can anything that goes into the mouth of a Christian defile him? Ro.14:14 (???)
Assuming that there is no one around with a weak conscience, should Christians ask questions of conscience about meat served in the home of a pagan idol worshiper who is known to eat things strangled? I Cor.10:27
Why do you think Jews could eat animals found dead in their fields (unbled) with relative impunity. They would merely have to wash their clothes and be unclean until evening.
Leviticus 11:38,39 - "If an animal that you are allowed to eat dies, anyone who touches its carcass will be unclean till evening. Anyone who eats some of its carcass must wash their clothes, and they will be unclean till evening. Anyone who picks up the carcass must wash their clothes, and they will be unclean till evening."
Note: It took JWs over 70 years (right up to 1945) to find rules restricting blood use when they are so obvious to JWs now. It's interesting that Jesus appointed the F&DS in 1919 when JWs were still being encouraged to work for the Red Cross as alternative service and give and receive transfusions when necessary?