Are kids responsible for online cowardly theft?

Back in Elementary School, before year 2006. I let a friend burrowed The Legend of Zelda: The Minish Cap for his Pokémon Yellow. He transferred to another school, and says, “his Mom loves The Legend of Zelda: The Minish Cap, and would think I like Pokémon Yellow.” He transferred to another school, and didn’t return the game I let him burrowed. Then, in 2006. People are stealing from people in MapleStory, and stealing from people online, and can’t get back the items they gave someone online.

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People was stealing from each other in MapleStory between year 2006-2010. I heard rumors about people stealing Pokemon from other Pokemon players that other players traded with.
Are kids responsible for online cowardly theft?
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