Here's a few that they forgot to add to the list:

* The fact that all citizens aren't required to log all activity of any sort with the government so that government officials and scan the log files for patterns makes it harder for Feds to find "terrorist activity."

* The fact that some things require warrants makes it harder to find "terrorist activity."

* The lack of an all-knowing, all-seeing eye makes it harder to find "terrorist activity."

* Considering people as human beings rather than just numbers on a screen makes it harder to find "terrorist activity."

* The fact that all locks aren't required to register a master key / combination with the government so that any government official can bypass any lock at any time for any reason makes it harder to find "terrorist activity."

While we're at it:

* Government officials that break the laws and get little or no punishment reduces public confidence in the rule of law. This leads to citizens viewing the government as an antagonist which makes it harder to find "terrorist activity."

* The government spending copious amounts of money on the War on Drugs rather than repurposing said money to finding terrorists makes it harder to find "terrorist activity."