Not quite sure they are really that useful for torrents. There have been several announcements of VPN providers asked to block torrent searchers and trackers. So I think now a days, VPN doesn’t even live up to the torrenting functionality.

The best that can be done, I’d guess, for torrenting, is to use pseudo encryption, to prevent non sophisticated ISP snoopers detecting torrents, like for rtorrent:

protocol.encryption.set = allow_incoming,try_outgoing,enable_retry

Though I’d prefer:

protocol.encryption.set = require,require_RC4,allow_incoming,try_outgoing

But it doesn’t work, :(. I’m wondering if some more effective encryption would ever be achieved on torrents, without preventing finding seeders/leechers…