It stands to reason that most entry and exit points are run by the NSA. All they have to do is match streams via rate limiting games to unmask.
But they are logging that information in some database somewhere. So it's not a question if they care/ will enforce it now, but rather will they care or enforce it for the rest of eternity.
What people don't seem to understand about privacy is that once you give it away, it is gone forever. In some dystopian future where every American is assigned a social score, you pirating things in the early '00's may harm your ability to get a house loan.