So I wonder: would the copyright nazis be able to use this kind of data corollary in court against an accused defendant? If the offense is civil I could see it being admissible since the burden of proof is lower (just has to be “fairly likely” AFAIK, but IANAL) than in criminal court. Though I don’t know if copyright infringement is a civil or criminal charge, and trust may depend on state.
Still, at best they could only match up pieces of the chain to dates times and data sizes, not see the actual data being transmitted over that connection (broken/weak crypto withstanding). But that might be enough to further persecute fair use, not to mention since other very dark stuff.