The FBI and other law enforcement organizations world wide have a made VoIP a huge concern, wanting to have the same ability to "wiretap" that they have with standard telephone service.
While no one wants to stop them from having this ability, the Center for Democracy and Technology has issued a white paper on the subject.
From where I sit, unconventional issues require unconventional approaches. The goal of being able to tap Internet phone calls is not wrong. It is what will keep our world safer. The problem is in the thinking. The authorities and regulators have to approach the problem from a different viewpoint and not try and use old telco thinking with new technology solutions.