1. Data is collected without a court order, by an otherwise trustworthy government (for the sake of argument). 2. Time passes and government policies change 3

1. Data is collected without a court order, by an otherwise trustworthy government (for the sake of argument). 2. Time passes and government policies change 3. Information that was previously inadmissible, and which should have never been collected in the first place, is now admissible. When we talk about law, we can't just consider how the current government will use it. We need to restrict how a future government could abuse it. You see the same pattern all the time in software: Some assumption is made in an earlier version. The basis of that assumption becomes invalid after further development. Now the thing that didn't matter before gets a bug added to your queue.