The spy agency didn’t care about copyright violations; it was trying to determine if it could find valuable intelligence.
The NSA has a file on all of us and our bad music tastes from the early 2000s! This is bad, and for the record, it was not us downloading those Britney Spears songs… it was… ummm.. a visiting cousin.
Source: NSA Broke the Encryption on File-Sharing Apps Kazaa and eDonkey