Usually the community gives out punishments, such as excluding them from social experiences. Blizzard however can only intervene when clear raid loot rules are given… Which up next:
If they use the ingame systems (Group Loot) where a popup appears to select Need, Greed, Disenchant, it is not against the game rules to select Need.
So technically, since they can Need on it being in the same dungeon. Is it nice? No. But the system gives them this option in Classic series.
It is indeed a Classic experience, because it is more strictly defined in Retail. That is how it is.
If you like to see Blizzard change the loot systems you can also suggest it through the ingame box.