Retargeting isn't the devil incarnate
Personalised targeting isn't the the devil spawn.
The simply fact is that online advertising is so spread out at current you're only going to encounter it if you browse on content sites that are using a common ad network/exchange. It is hardly stalking and you believe in any manner you have anominity on the internet you really need to get upto speed.
If you take you're stand point you litterally rule out GIS based systems and environments. Some of which you take for granted and more than likely accept as a handy means sophistication, such a example is the redirection you see upon typing in www.google.com where you're redirected to the google location of your country based on your route and IP Address.
You clearly show a distinct lack of knowledge on GIS and online advertising. As far as to say you simply view them as a form of scope creep or erosion of a false sense of anominity or "privacy" on the internet. Which is a foolish notion to hold onto.
An Opt In system is not only ineffective it is also not practical.
How many people are on the Internet in the UK alone?
How exactly are you meant to Opt In for the 20+ Ad Networks/Exchanges within the UK alone? How is it ever going to be enforceable?
How are penalities going to equated?
Do you even understand the cost model within online advertising?
Its based on a notion of cost per thousand (CPM).
Do you have any idea of what the typical rates for CPM are across most of the UK Networks & Exchanges?
Then equate that to some pay structure to yourself for showing an Ad?
You might as well begin to lobby/campaign that billboard and public advertising also pay you for take up part of your sight during your day.
Do you not begin to see how said compliant is a farce?