@ic3l9 yeah, found some policy papers about the directive in question and they admit that adblocker detection is a grey area and propose three different solutions to it, one of them is "do it anyway and see if they sue you successfully because it's not clear". The guy in that thread has a letter from an EU person saying explicitly that adblocker detection is a covered by the privacy directive but a letter isn't legally binding and the guy should know that.