If you really want to look at things that way, it is warriors and paladins who share their plate tanking drops with newcomers, those drops used to be only for us. Our right to those plate drops is exactly the same as yours. DKs right to 1h tanking weapons is IMO after shield tanks, but again, it should be pointed before inviting the DK, or at least before the boss kill.
Everything on that weapon, a DW DK tank can use and Warriors and Paladins are going crazy over the idea of having to share their precious loot tables with the DKs, something us DKs have to do with plate drops. I have never heard anyone say "Those don't have shield block, that should go to the DK tank and not the Warrior".