Is this ninja looting or at least against the rules?

[Questors]

Just think of all the crude steins that would have rotted if the hundreds of you had not just taken one off that dead Ogre Bouncer. A public service right? No wasting of usable loot, right?

Well gee, there's no harm in looting that lore stein. Right? But other corpses? Nay! That's a bridge too far! So how many of you got suspended or banned for that stein?

Abandoned AC corpse in South Ro?! Score! But wait! No. That's criminal! You dirty ninja loot whore!

In for a penny, in for a pound.

In the end, it's what one wants to justify in the moment. Easy win: Just don't loot a corpse that you didn't kill. We know this is not a thing though. People do it all the time.