Oh really? How about tajuu kagebunshin?
A Forbidden Jutsu belonging to only Hashirama
Well it is "Forbidden", it was locked away knowledge that nobody else had access to. I mean someone had Naruto steal it so they could use it themselves. Does that make that guy also connected to the first because he would have learned it from the scroll?
I mean even from the databook its only a B-Rank jutsu which I assume a majority of jōnin could learn if they got a hold of the scroll.