like, to be honest, my main issue with the shared instance block lists is not that they exist, but that:
(a) they are not sourced with any of reason for why you should block them,
(b) some of these instances don't really have good reasons for why you should block *everyone* on them,
(c) some of them are nonsensical because either they're misspelled, or Mastodon can't federate with them anyway,
(d) despite these issues, people are encouraged to import them anyway For The Good Of The Users,
(e) unintended consequences could happen if every instance just adopted this list; whoever decides what gets on it controls a large part of the fediverse.
tl;dr: outsourcing this decision-making to someone else without review is a really bad idea unless you really trust them