Depends on ones point of view of Piracy...
I see "positive" piracy as either salvaging or scavenging--taking what the target either gave away or left behind.
I am very able to obtain loot a npc left behind by the aftermath of an attack from a non pirate/assassin and its "legal"
Thats my practice of positive piracy. Anything else is by the words of Sun Tzu...aggression/violence ---- ie negative piracy
1 - This is good , when the NPC do it.... Plus there's no way to tell them to that.
2 - LTD Diamonds are a very good income, but we have problems (like ships disabled jumping , Or FSD locking and cooldown not working)
3 - NPCs dont give'up cargo with contact.(because we cant demand them to)
4 - If you see salvaging and Scavenging as piracy I'm sorry but this is not a pirate this is a
Scavenger 
(Pirates of Caribbean for example should be named Scavengers of Caribbean

)
Don't get fooled by the Disney movies... Piracy is bloody and messy... it always have been...
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Filthy sea Rats!