Very few provisions of the European Union intellectual property enforcement framework are subject to so many preliminary references as orders against intermediaries. The website blocking case law is also an interesting case study from the perspective of the European harmonization. It shows how harmonization by a halo effect can work. The widely-publicized use of a particular enforcement measure is replicated country-by-country, by a homogeneous group of stakeholders, thereby testing the local implementations and bringing its elements to the public scrutiny. The resulting picture painted by the domestic website blocking cases then reflects the state of Union harmonization. This piece contributes to the growing scholarship mapping the national post-implementation phase. It proceeds as follows. Part 1 gives a primer on Union law regarding injunctions against intermediaries. Part 2 explores the situation under the Dutch ‘localization’ of Union law, focusing particularly on injunctions, including against intermediaries, right to information and reimbursement of the costs. Part 3 explains the recent Dutch litigation chain concerning the website blocking and puts it in the broader context of discussions. Part 4 contrasts these findings with the situation under European Union law and practice in the other Member States. Part 5 concludes by evaluating the existing state of the harmonization in the area.