ISP's network scans passing web pages for keywords that are then used to target ads.

ECONOMIST: Behavioural targeting

Neil Smith, General Manager, Media Services, AOL, told me the ISP has leveraged the Network Magic platform to help reduce AOL's enormous call volume.

ENGADGET: The Family is the Network: Pure Networks' Network Magic wants to make things simple

When an ISP decides to manage its network in a certain way it has implications for everyone - the Inland Revenue seems to have fallen foul of a feature that it did not have any control over and could not anticipate.

BBC: The problem with e-government