With all of these, one has to wonder what ISN'T a threat to national security? And who gets to be the final arbiter of what is and isn't? Perhaps we need a "Threat to National Security Czar" to sort it all out. Maybe we need a standardized definition of what a "threat to national security" is? Of course, if we did that most of the boogey-men would go away.
I am just going to start laughing at anyone that mentions "threat to national security." If anything can be construed as one, then the phrase is meaningless and just being used to scare people into action. It only took about 50 years of using the race card before it became meaningless. The national security card has bested that by becoming meaningless in less than 10 years. What's next?