@Ledswinger
I'm in two minds about this. I agree that plundering war graves is a despicable thing to do, but in this case, those most affected by the loss of the Hood appear to have given their blessing. By the same token, if the relatives of the Bismarck or Bretagne's crew were OK with it, I would feel that their wishes should be respected, provided the respective governments agreed.
What does bother me is the risk of this setting a precedent. They've got the bell and no-one's complained too loudly, so hey, why don't we get the wheel? Or some of the guns? After all, there'll still be plenty of twisted metal left down there to 'memorialize' the ship.