The Security Mentor

It's actively harmful.

A student got his study grant deposited into his bank account and got a notice that his acccount would be closed for "suspicious" activity. His phone calls weren't answered, his in-person visits got no information, nobody ever explained what he had supposedly done wrong.

Successful anti-terrorist surveillance starts with known or rationally suspected terrorists and traces their contacts. Mass eavesdropping and data mining will find terrorists only by incredible luck if at all, and will put many more innocent people through experiences like that student's.

We should not be patterning our security measures after Franz Kafka.