I got your point, but was thinking differently.
I thought ninja looting in dungeon was needing an item you don't really need with a goal to either intentionally don't let someone get the item (grief), disenchanting/vendoring, helping friend to have a higher chance of getting the item.
But it's a bit weird that some weakling's slight upgrade (which will be potentially replaced very soon) is more important than my achievements.
I believe both are equally important, and I should not be obligated to cater to other's wishes too.
But it is what it is.
I got another hypothetical situation:
If DBW drops and I (as a raid leader, but ret paladin) win a roll and loot it to myself would it also be considered ninja looting?
I mean DBW is not a paladin trinket, but it's not completely useless, is it?
I believe there are people unaware and lacking game knowledge about trinkets that could do that stuff.
Is this also ninja ?