"The problem, according to the officials, was that the top secret Internet-sweeping operation, which was targeting metadata contained in the emails of foreign users, was also amassing thousands of emails that were bundled up with the targeted materials. Because many web mail services use such bundled transmissions, the official said, it was impossible to collect the targeted materials without also sweeping up data from innocent domestic U.S. users."
There is a real problem when the partition of people whose email metadata was collected are divided in "foreign users" and "innocent domestic U.S. users."
Are foreign users guilty by definition?
What about that innocent until proved guilty thing, supposedly a foundation of U.S. jsutice systerms?