If you need to do that, then you seriously need to rethink your definition of justice.
Liberty is not to be given up. Ever. Under no circumstance.
Millions of people in History have died for Liberty. No one should forget that. Especially not the citizens of the one country in the world that used to base its Pledge of Allegiance on the words "Liberty and Justice for all".
But hey, you don't actually recite that old thing anymore, now do you ?

"UK Surveillance Society 'danger to individual liberty'" -- Obviously. Throughout human history, total surveillance of an unarmed populace always leads to a nearly total loss of meaningful personal freedoms. On the other hand, UK politicians are beyond reproach and will remain so forever... Not.

At some point you need to give up a bit of your "liberties" for justice. The same surveillance they're criticizing helped catch suspected bombers years ago.

Can hypocrisy be so stupid as to assume that people will do the “right” thing when empowered? No, but the rationality is that you’ve got to do something. Double-edged swords or not, tarring all with the same brush should keep things in check, right?. Not when technology can blow all away with a press of the same button in the manner that perpetual kleptos delight in being able to print money and jolly rogers too. And which idiotic chosen few lunatic gave vent to that reasoning. The one who is now on his way towards immortality. A real nutter if there ever was one. The police don’t care as long as it make their jobs easier and the chosen few don’t care as long as they can mint from it and the politcians don’t care as long as they can be seen to be engels in the making. Education, education & education will not do the job. It’s moreality, morality, morality and not moralising, moralising, and moralising. And the difference between the two is not whether you own the truth within a given matter. It’s whether you are truthful or whether you’ve never been caught. The majority of dumb blankness don’t care as long as they can sit on the fence until hypocrisy beckons and then, they too become angels in the making. That’s called moralising.

"Liberties...
At some point you need to give up a bit of your "liberties" for justice. The same surveillance they're criticizing helped catch suspected bombers years ago. "

I'm not so sure about that: Take a listen to this: http://www.npr.org/templates/story/story.php?storyId=4780612