Some experts are suggesting that the UK's new childrens' database will become a tool of pedophiles hunting for vulnerable children. See: The Sun Online - News: List could put kids at risk.
Update (20060901): At least celebrity kids will be protected:
Telegraph News Celebrity children will get database privacy:
... Lord Adonis, the education minister, told the House of Lords: 'Between 300,000 and 400,000 users will access the index. Children who have a reason for not being traced, for example where there is a threat of domestic violence or where the child has a celebrity status, will be able to have their details concealed.' ...
Via Privacy Digest.
(BTW: "Lord Adonis"? That's my nickname.)