Seriously, who cares whether or not a power is given, stolen, or anything else like that? I mean, does it really matter?
When someone says "Hey, that's not Naruto/Sasuke/Kabuto/Obito's power! He shouldn't use it!" it translates to "I can't counter the power he's using, so I'll b*tch instead!"
Are you going to enter the manga and personally tell then what you think about their power? No? Will they care about your opinion or stop using that power?? No?!
Then shut up. It's totally irrelevant because they can use every power they have whether you like it or not.
When someone says "Hey, that's not Naruto/Sasuke/Kabuto/Obito's power! He shouldn't use it!" it translates to "I can't counter the power he's using, so I'll b*tch instead!"
Are you going to enter the manga and personally tell then what you think about their power? No? Will they care about your opinion or stop using that power?? No?!
Then shut up. It's totally irrelevant because they can use every power they have whether you like it or not.