I think we have to accept that in the future the gov't will have access to all of this information about us, like it or not, and attempting to subvert that isn't going to be successful. The important things are:

1. To make sure it is protected and that nobody (within the gov't or outside) not cleared to access it may do so.

2. Have EXTREMELY strict rules as to what purposes the information may be used for. As an example, if someone is documenting my travel patterns and digging for information to determine whether I am a threat to aviation safety and security, letting the DEA know I travel to Colombia monthly and always come home with an extra suitcase would be strictly prohibited. As technology develops, we will continue to develop our informational reach (however we justify it, it's because we simply can't help ourselves) and the most important thing is to have limits in what we're allowed to do with the results.