When it comes to fighting terrorism I am of the opinion that governments should spend their time and resources watching the bad guys and stay out of my personal freedoms. The question is are the people willing to eventually give up all their freedoms for security? I believe the anti-Christ will use such technology to control the populations.
That is not to say that it does not contain good- who doesn't want to get rid of kiddie porn, etc. I simply believe it can be done in a less invasive way. If you study history many of the things Hitler put in place and later used to take power seemed logical and good on the surface.
A friend of mine once said this " I love my country, it is my government I do not necessarily trust".