i downloaded seasons one and two of true blood, plus the new episodes. never got this warning. plus i download showtime, porn, cable and network tv shows, feature films, etc. all on roadrunner (with that turbo boost thing). sounds like maybe thumbscrew and peterk may be on the right track.
when i told you to google i just mean i dont think KR
has the answer you really want, and youre the one who got the warning. i think other people online are better qualified to help you and my quick google searches that i did for you weren't very clear. i tried to find that economist article but i forget what it was called and it wasn't easy to find by searching their site. anyway i hope you dont get cut off!
i use transmission for my BT client.