"Run! Get out while you can!" is my trademark. Get your own.
As for the original post, I fail to see the problem. No one's claiming this is some anti-terrorist scheme. It's to settle petty disputes between bitchy neighbours.
What are the secret service going to do with it? Identify protesters in Westminster by their voice, rather than with a camera? Uniquely identify passing cars by their engine noise? Listen to our conversations as we shout them across the street? Claim they've overheard a conversation between 2 Al-Qaeda operatives in the street and then declare martial law?
It's part of the great, British tradition of bitching at your local council.