Torrent Sites is for that many people do use torrents for good purposes. Some sites have larger files that are available for download like the last 6 months of podcasts, Linux distributions, or other things. They are using Torrent Sites as a way of saving money on bandwidth. If twenty computers are sharing these files with the world, it saves on server costs and gives their users more simultaneous connections to the torrent than there would be to a server.
In the end, without the use of Torrent Sites the same bandwidth will still be transmitted across the network, it just won’t be via a torrent. The truth is, when people want large files, they will find a way of using that bandwidth since the file is something that is wanted. Torrent Sites is a great technology that is being targeted. Hopefully there will be a rational solution to allowing torrents in a world with bandwidth becoming more scarce since this technology does have quite a few practical applications for transmitting data across the Internet.