Here's my take on this:
Most persons who die through lack of blood have made that choice for themselves. The consequences of such a course of action (often death) generally have an effect which is limited primarily to the individual who is refusing treatment.
However, the victim of a decision to shun has no input into that decision. Therefore the 'victim' of shunning is a helpless recipient of that policy. He/she has no control or responsibility for the punishment imposed.
Shunning is therefore a more destructive policy. It makes a judgement and imposes a penalty which has social implications for the individual and his/her friends and family, who maybe forced to become 'shunners' against their will. It is a form of hierarchical control which takes responsibility and power away from individuals.
I believe that the policy of shunning is more offensive to the general public for these reasons. The blood issue is often the only thing which the public know about JWs and it has a certain martyr value. People just think: "Gosh, they must really have faith in their belief". However, if people knew about shunning they would be much more shocked.
It's a grubby little custom that JW's have been practising for many years, IMO it's well time that they grew away from it.
Englishman.
Nostalgia isn't what it used to be....