Thank you for the feedback. Could you write which sites failed for you? Best use https://github.com/serv-inc/blacklist/issues.

UPDATE: yes, many of even the top 10 sites were not in the blacklist. Some have been added at https://dsi.ut-capitole.fr/cgi-bin/squidguard_modify.cgi. Add more to improve the list and this addon.

UPDATE: Have a look at version 0.5. Still, reporting any missing files via the link above (or Email to the list's curator fabrice.prigent@ut-capitole.fr) would be appreciated.