weirdr.net is a Fediverse instance that uses the ActivityPub protocol. In other words, users at this host can communicate with people that use software like Mastodon, Pleroma, Friendica, etc. all around the world.
This server runs the snac software and there is no automatic sign-up process.
Only when a post is boosted or replied to do I run the risk of my hot-babe CPU monitor turning nsfw. So better keep it boring, I guess.