I'm with Warbler xD

But c'mon...the government is fairly indiscriminately monitoring telephone calls and emails in order to look for patterns. If the government knows that the terrorists are changing their tactics (and though it's only asserted, that those changes are evading that huge net), then the government knows because it's watching it in real time.

I read an article, forget where, that suggested that hiding such a program from the public is based on absurd and dangerous reasoning. He analogized it to a program where police put undercover officers on street corners. While it would be dangerous to divulge the identity or location or a particular officer...saying that there are undercover officers on some street corners throughout the city is a tactic that should be open to wide debate. And if the criminals know there are undercover agents on any street corner...yeah, they might change their tactics! But with such a wide net, unless they stay out of sight (ie all of them off the internets and phones) they won't evade detection.

We should be wary of what we don't know, of making broad assumptions, etc....but on its face, the government cries of betrayal and danger smack more of fear-mongering for its own sake and to keep the public in the dark about practices ripe for abuse.