Enemy of the State
Will Smith, who has done nothing wrong, accidentally winds up in possession of proof of crimes by a powerful person in the government. To recover the evidence, the "big bad" deems Smith a national threat and the NSA hunts him with advanced surveillance such as public cameras, debit card access logs, and tracking devices.
This movie speaks to the power of vast data and monitoring systems and how a very small handful of people can target and destroy anyone using these systems. While these threats are mostly theoretical at this point, it's important to make sure that government capabilities are limited and accountability strict.