I agree with pretty much every thing you say, and at risk of telling you what you already know, would point out that when you say, "that law enforcement agency now has the goods on you and can harvest you." that law enforcement agencies can harvest us whether they have to good on us or not. If the law want you, the law can find a reason to arrest you. The issue is that by downloading these files one becomes a larger target, sticks out in the crowd, makes the effort worth the trouble so to speak.