Any NSA spying on our browsing data would be illegal in this country (BTW, do you have any documentary evidence of that?)
But Phorm claim that their system will be completely legal.
If you (really) want further information about the arguments against Phorm, I'd suggest you have a read of
BadPhorm.
However, if you're simply a troll aiming to stir up a fight here, I'll expect you to carry on baiting...