Comcast's practice of interfering with peer-to-peer traffic is hardly news to anyone, but a new study has found that Cox Communications and Singapore's StarHub have been meddling with their subscriber's connections as well.

What is a bit more interesting - though not really that surprising - is that although Comcast defends its content blocking practices as "reasonable network management" that is done only on peak hours of Internet use, the report indicated that both Comcast and Cox blocked or delayed BitTorrent traffic at all times of the day.

Comcast's content blocking has already led to various customer lawsuits and several hearings into proper network management conducted by the FCC, so these findings could spell even more trouble for the ISPs which must deal with the legal questions such activities brings up.