The problem is that every site owner displays a slightly different popup. A few of my friends were trying to build a chrome extension[1], but they soon figured out they are going to need custom Javascript for every site in Slovenia (and others of course, but they were focusing on Slovenia) and they abandoned the project.

Personally I believe EU should target browsers not site owners for this. At least by doing so we would get a standardized UI and the ability to opt-in or out.

[1] https://chrome.google.com/webstore/detail/peeshkot/idfkeeahc...