An article at News Com Com Com Com discusses how the FBI wants to extend the Telecommunications Wiretap laws under CALEA into Cable Networks for IP-based communications. There may be privacy concerns, but I don't see any difference from landline wiretaps. Although, most IP-based devices are encrypted and circumventing the encryption is against the law. The DMCA (pdf) may actually come back to bite the government in the arse.

The DMCA is bad for other reasons, one being that it's overly abused.