If I am paying X amount of bucks for a connection to the wider Internet, I should be able to use that connection for any content, over any protocol I wish to use. Comcast is now blocking an entire class of customers, by restricting all access to the BitTorrent protocol. I use BT to download disk images of Linux distributions. It’s an entirely valid, legal use. Would they rather I flood their pipes with tons of downloads. Yet another reason to not use Comcast. See Comcast Throttles BitTorrent Traffic, Seeding Impossible for more information.