This is basically what I do. More often than not they'll just ignore your requests, until you threaten that you'll inform the ICO (information commission office

This is basically what I do. More often than not they'll just ignore your requests, until you threaten that you'll inform the ICO (information commission officer for the non-UK people). They usually quickly respond and take you off their lists. Either way, they usually tell you they put you on their lists because of 'legitimate interest' which is daft but there we are.