Could blocking ad blockers be illegal in Europe?

Detecting whether a reader is using an ad blocker could be illegal in Europe, privacy campaigner Alexander Hanff claims. Digiday’s Jessica Davies fact-checks Hanff’s claim: Ad-blocking detection in and of itself may not be illegal, but it might require consent, depending on how the law is interpreted. And websites may not technically be verifying that an ad blocker is installed, but rather whether the ads were delivered, a small distinction that makes the issue more complicated.