none: did a template Data Protection Act Notice.
http://www.mediafire.com/?b00jbvjabdd
id be inclined to change it a little and add an 'i expressly forbid my person data be passed ,processed or exported to any Profiling electronic device' .
you send this letter by registered post (for legal reasons, and VM removed the electronic email notice from their T&C ,plus you then have proof should they try and deny getting notice) to your ISPs(or what ever company that has your data) data collector.