Actually, law enforcement can already tap all internet traffic from a certain individual, special boxes have been created that they install at the local ISP, that supposedly can tap traffic from a certain customer and leave all other traffic alone. If i recall correctly though, a significant flaw was found in the first generation box that tapped other traffic as well, but i think they got that ironed out. 911 access still needs to be done though.
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Actually, law enforcement can already tap all internet traffic from a certain individual, special boxes have been created that they install at the local ISP, that supposedly can tap traffic from a certain customer and leave all other traffic alone. If i recall correctly though, a significant flaw was found in the first generation box that tapped other traffic as well, but i think they got that ironed out. 911 access still needs to be done though.