@ariadne i hope so, but i wouldn't say that i know.
because in my experience, some people are just not exactly... measured... in their moderation style. delegated trust only works if you're very explicitly informed about who you give that trust. and with the current instance model it's not trivial to change as a user either.
(i'm very happy on treehouse)
this is a very biased perspective from my miserable time as a small time instance admin, but shared blocklists have the potential to amplify that too.