internet advertising is pretty damn undesirable. As far as I have found, it only achieves one thing: It identifies companies that I would rather not have anythging to do with.
Behavioural advertising is just plain nasty and the expression "richer browsing experience" is like calling rape a "loving embrace".
Take a real life example: How would YOU feel if I followed you round the shops, making a not eof everything you looked at, so I could push flyers for selected products into your hand
Woud you
A) regard that as a "richer shopping experience"
B) Punch the living daylights out of the creep following you around.
Fortunately you can avoid (for the moment at least) this highly undesirable advertising. Just make sure ad-emea.doubleclick.net is included in your Hosts file.
See, for instance: http://winhelp2002.mvps.org/hostsfaq.htm
Nasty is as nasty does
Behavioural advertising is nasty, nasty, nasty, NASTY