Board Thread:General Discussion/@comment-28279817-20190525031314/@comment-9605025-20190525080306

There is also TitleBlacklist which, despite not being listed on Help:Extensions, should be enabled according to Special:Version. The blacklist system message is included in the whitelist of system messages. I am assuming it is just an oversight that the whitelist is not also in the list on that page (since the list on the help page is not directly linked to the actual whitelist but is simply a separte list users have put together of what is supposed to be on the whitelist).