How do they solve the torrent liability problem? My understanding is that if you download something via torrent, you are also uploading/distributing, and as I

How do they solve the torrent liability problem? My understanding is that if you download something via torrent, you are also uploading/distributing, and as I understand it, that makes your liability rather higher if the content happens to be illegal - you are not just in trouble for downloading/possessing said content, but you are also in trouble for distribution of said content. I thought this was a big part of the rise of 'tube sites' for questionable content.