Look, it is absolutely absurd to allow the government to take away freedom and privacy for the sake of being "safe". Even with all this technology they still couldn't prevent 19 terrorists with box cutters and flight degrees.
Look at the UK, they invested a TON of money into putting thousands of security cameras all over London. Despite the mass invasion of privacy it hasn't stopped crime, nor terrorism if you read the news.
I'm certainly not saying we should do nothing, but what I am saying is handing over that much power to law enforcement is not only wrong, but completely against the very concepts of freedom and liberty. A very slippery slope toward abuse as well.
I don't know about you guys but I don't want to be ruled by Islamic extremists OR a big brother fascist police state in the future.