You can block nasty people on Mastodon at a personal level, by clicking the "..." below their post or on their profile and selecting "Block". You can also block their entire server by selecting "Block domain".

However, personal blocks will not stop them from communicating with other people on your server.

Your server's admin can create server level blocks, which are much more powerful than personal blocks. Server level blocks completely prevent the blocked person communicating with anyone on your server.

If you see someone being a bully or doing other anti-social and nasty stuff, the best option might be to report them to your server's admin, by clicking "Report..." instead of "Block...". Reports can also be optionally forwarded anonymously to the nasty person's home server, where the admin can delete the nasty account if needed.

Server-level blocks can be made even more effective if your admin activates "Authorized fetch" (also known as "Secure mode"). Ask them about it.


For Mastodon server admins, a bit more about the "authorized fetch" feature.

It makes it more difficult for blocked accounts to interact with public posts on your server. It's not fool-proof as public posts can always be scraped by outsiders, but it makes life harder for trolls etc so it might be a good idea to switch it on.

It isn't controlled from the graphical interface, it can only be activated by editing a file on the server manually. There are technical details here:

If you're on a managed hosting service, don't worry about the technical details. You can ask the service itself to make the necessary changes.

As it says in the documentation, "authorized fetch" isn't on by default. According to the developers this is due to the additional resources it consumes and the possibility of breaking compatibility with instances running older software.

It's up to the admin of each instance to decide what the best balance is.

@feditips Akkoma has this option too, but it is able to be enabled in the admin-fe's activitypub settings. :)
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A general-purpose Mastodon server with a 1000 character limit.

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