Thanks to privacy advocate and anti-phorm campaigner Peter John of www.deformation.org.uk I found the way to stop Phorm from snooping and using your website’s data for their benefit.
In fact it’s quite simple as long as you have PHP or some server side technology on your web server.
An image (or another) request to your site responds with a cookie with the same format as Phorm’s opt-out cookie. So after you’ve opened this image in your browser Phorm won’t track what you do on my site. Neat!
In my case I used the default code and image from the dephormation script.
Have a look there for an easy how-to guide.
Have a nice day :)