Now I'm not glued to this list, if genuine issues are raised that can't be resolved, I'll stop using it going forward, but to date we've never had a single instance contact us and ask to be removed from our block list and we've had only one user that has even noticed it impacted them.
I'm always happy to have a genuine and open discussion if there are real concerns with the list we're using, from my experience running it over on MastodonApp.UK, it's proven to be a really solid list, and it's near impossible for one off issues to result in being added to the list, combined with the fact we don't stream the list in, if servers do get added and quickly removed, 99% of the time we never even know they had ever made it onto the list.
This doesn't mean we have or will stop adding servers manually, but it does give us a head start and tries to mean we're dealing with the new servers where our community has had to see something and report it.