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things i would like to see in mastodon that pleroma has been able to do for years:

- the ability to defederate an instance except for *explicitly approved* accounts (pleroma has supported this since the beginning of MRF in 2018)

- the ability to defederate a hashtag (pleroma has supported this since 2019)

- the ability to quarantine unknown instances until they are approved by the admin (pleroma has supported this through a combination of multiple features since 2019)

- the ability to forcibly mark posts with content warnings based on keywords in their content (2018)

- the ability to forcibly mark media as sensitive based on keywords in the post's content (2018)

- the ability to reject media selectively based on various admin-configured signals (2018)

- the ability to derank remote posts based on their sentiment (not in pleroma mainline, but has been an active area of research in the MRF subsystem community since 2018)

- the ability to remove content warnings that are useless, e.g. from actors which constantly shitpost using content warnings (2018)

- the ability to require signups to complete a CAPTCHA to reduce instance abuse (2019) (edit: finally implemented in mastodon in 2023 and only because it became a problem on mastodon.social, which people started defederating)

- the ability to limit what instances get sent posts from a local actor (for example: to limit the possible damage caused by spicy posts) (2019)

- the ability to personalize representations of local posts when pushed or fetched by remote servers, e.g. to mold them into being consistent with that remote server's policy (2020)

- moderation tools that are designed to be composed (e.g. used in concert with other moderation tools as part of a larger solution) (2018)

- automatically detect and mark explicit content as sensitive using perceptual hashing (2021)

- automatically reject illegal content using perceptual hashing (2021)

- block content using DNSBLs (2021)

- block incoming messages with excessive links (2019)

- block incoming messages with excessive mentions (2019)

- force bot traffic to post unlisted (2020)

- automatic mitigation of server-DoSing hellthreads (2018)

- automatic rejection of messages which reference unwanted remote emojis (2023)

- automatic follow spam blocking (2019)

- normalization of message HTML and mention/hashtag formatting (2019)

- normalization of inline mentions and hashtag presence (2019)

- filtering of activitystreams content types (2019)

i could keep going, but i think i've made my point

@ariadne i really hope #gotosocial @gotosocial devs are watching this