Torrent downloading and torrent seeding are absolutely not allowed. Few people seem to know this, but bittorrent consumes a huge amount of resources. BT uses dozens of open connections, writing to dozens of individual files at separate locations, many times a second. The amount of memory and CPU load needed to run just one single BT client is very high. We run NFS-mounted home directories and BT over NFS is extremely inefficient and causes performance slowdowns for everybody on your server and everybody sharing your network storage filer (which could span dozens of other servers.) CPU usage tends to shoot up to a load of 50, 100, or even 150.. where normal is 2.
Because of this, BitTorrent violates two parts of our terms of service. It is a "server process", that is, it listens on ports for incoming connections and it runs after you've logged out. It also interrupts service for other customers. All BitTorrent clients will be killed on sight regardless of what type of content they are transferring.
Trackers, on the other hand, are disabled on a case by case basis. If it's a process that listens for incoming connections, it will be disabled. I've seen some BT pages made in PHP and sometimes they're acceptable, and sometimes they're so badly written that even the most moderate amount of traffic will crash the server repeatedly. The latter get disabled very quickly.
Anything at all involved in piracy of any kind will be disabled regardless, for violation of our lawful purpose clause of the terms of service.
Hope that helps.