At least I know which area
this cunning and devious predator stalks. I shall certainly stay away from that area. The Home Office should run a phone-line: Is John Reid in your area?
I mean, when Bernardo's tell you your child-protection policy is shit, you know something's wrong. If I were a parent, however, I'd use this scheme if it were nation-wide. Even though I know that paedophiles also have cars.
They don't even tell the exact address or name - so you're going to get lots of innocent people beaten up and maliciously accused.
I suppose there's an argument that this will deter paedophiles to a greater extent that they are currently, but I doubt it.