Tamitha is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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Not sure I can do it from the mobile interface but when I get home, I want to mute an entire instance. I bet you can figure which one out.
@electrotamitha You can, just go to the profile of one of its users and there's an option called "mute everything from (instance name)" in the menu for that user.