No-one has ever been prosecuted for running a Tor node in the U.S., so the information you're looking for simply doesn't exist. That's why we have to go on the

No-one has ever been prosecuted for running a Tor node in the U.S., so the information you're looking for simply doesn't exist. That's why we have to go on the beliefs of lawyers familiar with the area, instead. You could read about things like the Safe Harbor provisions of the DMCA to see why Internet service providers are generally not considered responsible for their users' actions, in the U.S.