This raises the question of why Comcast would care.
Excellent question. There are a few things that an ISP can reasonably complain to a customer about:
* Excess use of bandwidth (I am not going to discuss what 'too much' is)
* Loss of IP address reputation, by this I mean getting their IP range blacklisted by spamming, etc
* Using up too much of their admin time. This might include dealing with copyright/DMCA type requests (again not interested here in rights/wrongs)
So, 2 reasons for wanting to know (roughly) what content a customer is moving. But these go away with TOR since the TOR IP addresses have nothing to do with the ISP, so they should not care. So what other reasons are there ?
* Requests from FBI/NSA/... that they comply with, willingly or otherwise
* Want to know what a customer is doing so that they can profile them to better monitise the customer (eg sell more targetted adverts)
Anything else ?