I'd like to point out that it's only the ISPs that have to keep the data for 2 years. As soon as another agency has slurped it down it can keep it indefinitely.

I'd like to point out that it's only the ISPs that have to keep the data for 2 years. As soon as another agency has slurped it down it can keep it indefinitely. Realistically you would have the same effect if ISPs only had to keep it for a month or a week, but that would lead people to ask other questions and to shift focus on to the agencies accessing that data and how long they get to keep it for.