All of the campus is covered by wifi. It occasionally gets a little sluggish at peak times, but is still very fast.
It is technically not allowed to have wifi in halls at all, but if you bring/buy a router and put a password on it then they will turn a blind eye. They just don't want lots of people going through one connection.
Torrenting is not a problem for them, so long as you limit your maximum connections. I was cut off twice for uploading public torrents at vast speeds. I phoned them and they explained to me why it caused problems, told me not to do it again, and reconnected me.
The second time I said to them that I was uploading open source and copyrightless files and the guy was again very nice about it and told me that I needed to restrict the maximum connections to 20 and limit the bandwidth to less than 1MB/s upload
It doesn't sound great, but this is bearing in mind that I uploaded well over 1TB of data over the year in halls, and was otehrwise very pleased with it.