Eva Galperin and Nadia Kayyali write:
Imagine that you watched a police officer in your neighborhood stop ten completely ordinary people every day just to take a look inside their vehicle or backpack. Now imagine that nine of those people are never even accused of a crime. They just happened to be in the wrong place at the wrong time. Even the most law-abiding person would eventually protest this treatment. In fact—they have.1
Now replace police officers with the NSA. The scenario above is what the NSA is doing with our communications, under cover of its twisted interpretation of Section 702 of the FISA Amendments Act.
Read more on EFF.