Was just thinking about the new threats to file sharers going around and a random thought occurred to me. Where exactly is the line drawn in file sharing and piracy battles, and how do the ISPs determine whether you have downloaded a flagged file?
If they are tracking our traffic through torrent trackers they may see we are participating in file sharing, but how can they tell how much of that file we actually received? Can I download 80-90 percent of any file and then cancel the download and be safe? How do they know what I'm doing and if I only download half of any file how can I be accused of piracy?
This is just meant as a though exercise. I don't know exactly what the law says, but it seems to me that this loophole could be a valid legal concern.