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gotosocial/docs/federation/moderation.md

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Moderation

Reports / Flags

Like other microblogging ActivityPub implementations, GoToSocial uses the Flag Activity type to communicate user moderation reports to other servers.

Outgoing

The json of an outgoing GoToSocial Flag looks like the following:

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "actor": "http://example.org/users/example.org",
  "content": "dark souls sucks, please yeet this nerd",
  "id": "http://example.org/reports/01GP3AWY4CRDVRNZKW0TEAMB5R",
  "object": [
    "http://fossbros-anonymous.io/users/foss_satan",
    "http://fossbros-anonymous.io/users/foss_satan/statuses/01FVW7JHQFSFK166WWKR8CBA6M"
  ],
  "type": "Flag"
}

The actor of the Flag will always be the instance actor of the GoToSocial instance on which the Flag was created. This is done to preserve partial anonymity of the user who created the report, in order to prevent them becoming a target for harassment.

The content of the Flag is a piece of text submitted by the user who created the Flag, which should give remote instance admins a reason why the report was created. This may be an empty string, or may not be present on the json, if no reason was submitted by the user.

The value of the object field of the Flag will either be a string (the ActivityPub id of the user being reported), or it will be an array of strings, where the first entry in the array is the id of the reported user, and subsequent entries are the ids of one or more reported Notes / statuses.

The Flag activity is delivered as-is to the inbox (or shared inbox) of the reported user. It is not wrapped in a Create activity.

Incoming

GoToSocial assumes incoming reports will be delivered as a Flag Activity to the inbox of the account being reported. It will parse the incoming Flag following the same formula that it uses for creating outgoing Flags, with one difference: it will attempt to parse status URLs from both the object field, and from a Misskey/Calckey-formatted content value, which includes in-line status URLs.

GoToSocial will not assume that the to field will be set on an incoming Flag activity. Instead, it assumes that remote instances use bto to direct the Flag to its recipient.

A valid incoming Flag Activity will be made available as a report to the admin(s) of the GoToSocial instance that received the report, so that they can take any necessary moderation action against the reported user.

The reported user themself will not see the report, or be notified that they have been reported, unless the GtS admin chooses to share this information with them via some other channel.