It doesn't matter: torrents hardly enables it to exists, any more than ftp does; its just the current tool of choice for piracy.

You ban it, and they'll switch to something else, and you'll have done nothing but make things slightly less convenient but with relatively large cost to enforce. Why not just do the job properly and ban general purpose computers, limited to government approved and locked down hardware, os and apps?

Most Linux distributions provide torrents for disk images.