If someone steals your loaded gun and kills everybody on school with it, are you responsible?
A: Yes, because you kept it loaded.
A2: Not if you followed normal safety procedures, in which case there would never be a loaded gun in the first place.
Morale: Do every prevention of misuse you can, because only that will hold up in court.
They should be able to prove that YOU downloaded the stuff, not merely collect your IP and hope that will hold up as evidence.
"They" do not have to do anything at all. "They" read the law as if it were a Vulcan logic debate.