Such lists already exist, for example in Italy there's a number of official government blocklists that the ISPs are already obligated by law to apply using thei

Such lists already exist, for example in Italy there's a number of official government blocklists that the ISPs are already obligated by law to apply using their DNS servers and soon at the IP level, once the latest law is implemented. In typical Italian style, the blocklists are actually published as a set of HTML articles on various government websites, that must be scraped and parsed by the ISPs using toolkits like https://github.com/mphilosopher/censura https://github.com/mphilosopher/censura. The latest proposal now additionally requires acknowledgement through PEC, i.e. domains to block will be sent by rightholders through certified emails to ISPs, and upon processing them ISPs *must* send an acknowledgment in the form of another certified email within 30 minutes, or else sanctions will follow. This latest proposal has rightfully caused an uproar of the ISPs in groups like itnog (https://t.me/IT_NOG/106605/106606 https://t.me/IT_NOG/106605/106606), considering that most PEC providers only offer a few GBs of space, there's already a high risk of ack emails being lost (with subsequent sanctions), not to mention that the concept of automating domain distribution and acknowledgment using email instead of a simple JSON-RPC API is ridiculous, but that's what you get when bureaucrats make technical proposals :)