C Angelopoulos (2014)    Are blocking injunctions against ISPs allowed in Europe? Copyright enforcement in the post-Telekabel EU legal landscape Journal of Intellectual Property Law & Practice, 13 August 2014 - Oxford Univ Press

Further, even mere blocking can have more extensive
repercussions than intended: blocking entire websites,
for example, risks collateral damage in the form of disallowing
access to entirely legal content that happens to be
hosted at the same address

Citation: M Horten, A Copyright Masquerade (Zed Books London 2013) 27