EFF has a page on this topic, in case you haven't come across it: https://www.eff.org/deeplinks/2013/02/six-strikes-copyright-alert-system-faq https://www.eff.

EFF has a page on this topic, in case you haven't come across it: https://www.eff.org/deeplinks/2013/02/six-strikes-copyright-alert-system-faq https://www.eff.org/deeplinks/2013/02/six-strikes-copyright-... See the section on "What can I do if I receive a notice?", as it covers the arbitration process for dispute resolution. The upshot is: 1. You have to challenge within 14 days, dropping the $35 fee at that time. 2. You only get six choices of defense. 3. Case is argued in front of an arbitrator (not a judge) and the judgement is legally binding. 4. If you win, you get your $35 back. The second defense might apply... maybe... but you only get to assert it once. Assuming, of course, your arbitrator isn't more worried about retaining their clients than about delivering a fair judgement... Meanwhile, as for monitoring, frankly, no, there's very little you can do. A standalone firewall with basic port blocking enabled for common bittorrent clients would probably cover most uses, but for anyone determined, you need L7 packet inspection to identify BT traffic, and even that only works if encryption isn't being employed. Lucky for the group involved in CAS, they've managed to foist this technological impossibility onto their end users... convenient for them, not so much for the consumer. :/ Your best bet is, unfortunately, to stop offering broadband to your tenants in this fashion, as it opens you up to these kinds of legal issues. Edit: Fun Fact: TWC claimed account termination would not be a sixth strike penalty: http://mashable.com/2013/02/27/isps-six-strikes/#OImwJenOiiqn http://mashable.com/2013/02/27/isps-six-strikes/#OImwJenOiiq... Everything else I can find seems to suggest account termination is not supposed to be a consequence of multiple violations... is there additional background, here, that we're missing? You indicate a previous termination of service. What was that about?