RE: Comcast blocking p2p uploads

Has anyone (any lawyers here on the list?) investigated the legality
of this action? With the FCC eliminating common carriage limits on
ISPs, it seems that blocking traffic to/from particular IP addresses,
etc., is acceptable. But from this description of Comcast's activities,
it appears that they are using active measures to interfere with their
customers' actions (fooling their customers' equipment into believing the
machines at the other end have terminated the interactions). Could not
this be construed as violating DMCA and a dozen other laws that have been
invoked against malicious hackers?

Andrew Odlyzko