The InfraGard Progam: Another way they spy on us

Here's an essay by Arthur Silber describing the FBI's InfraGard Program:

http://powerofnarrative.blogspot.com/2013/09/when-state-floods-zone-reform-is-dead.html

And according to Jesse Trentadue, the FBI also is spying on us through its Sensitive Informant Program:

http://sainthoward.blogspot.com/2013/09/fbi-imitates-east-german-stasi.html

And then there's the Homeland Security "See Something, Say Something(TM)" Program:

http://www.dhs.gov/if-you-see-something-say-something-campaign

And even the ObamaDon'tCare Affordable (sic) Care Act will be collecting and sharing our personal information:

http://benswann.com/reality-check-obamacare-navigators-wont-have-to-pass-background-checks/

Welcome to the Snitch Society. Do you think all of this is necessary? Is ANY of it necessary?

In the case of the two biggest "terrorist" attacks in recent memory (9/11 and the Boston Marathon bombing), our government had PLENTY of warnings of pending attack but did nothing to stop it. Are we expected to believe that OUR warnings will be given greater credence than the warnings of intelligence agency professionals?

And please explain something to me: Why is it lawful for the US government to spy on its citizens (something which should be both unlawful and unconstitutional), and at the same time UNLAWFUL for concerned citizens to report government wrongdoing? The government's excuse is that the alleged wrongdoing is CLASSIFIED. Do you buy that line of BS?