[DanBC]

I don't think MS are going to keep the IPs. There's no point just keeping a long list of IPs and times - they'd need to actively report those to police for the police to take action or not. It seems trivially easy to flood with bad data.

MS and Yahoo are implementing this in an effort to prevent MPs forcing regulation onto them. Any forced regulation will be stupid.

Google has said they're considering something similar.

I wish MPs would understand the vigorous efforts that search engines go to to find, remove, and report images of child sexual abuse.