I managed to read the following form the BBC new service

"We remain concerned about the risk of vigilante action and sex offenders going underground. All new local schemes need close management and proper resourcing to avoid this," she said.

But Chief Constable West said people would not need to share the information as police would inform any affected party.

"If there is information that says someone with previous offences for child sex offending is living in a particular house next door, and became known to a person, if there were other children to whom they have access, clearly that would come out in the course of the investigation and we would disclose that appropriately to anyone who has children who are at risk," he said.

"The point is, we don't go for widespread public disclosure to anybody and everybody because that's just the sort of thing that leads to the vigilantism which we've seen in the past."

[From BBC News - Police doubt 'Sarah's Law' will cause vigilante attacks]

Wow - have these "spokespeople" never heard about the Internet - if you give out such information to anyone it will be very likely that you will find it out there for anyone to access soon....and if that is not "widespread" then I do not know what is..