From a strict technological perspective copyright holders can today truly enforce their rights ex ante by creating closed environments in which the consumption of digital works is strictly controlled by DRM systems. The scope of such control is however usually attributable to a given business model rather than legal compliance because the copyright framework (and particularly Art. 6 InfoSoc Directive or Art. 11 WCT) does not regulate the use of self-enforcement technology other than generally prohibiting others from circumventing it. Although such protection of DRM systems is, arguably, needed to deter piracy and encourage rightholders to digitally distribute content, once a digital work has been acquired from a (legitimate) source, there i...