These are public toots tagged with #knuckletats. You can interact with them if you have an account anywhere in the fediverse.

You’re a person, not a product
Mastodon is not a commercial network. No advertising, no data mining, no walled gardens. There is no central authority.
A more humane approach
Learning from failures of other networks, Mastodon aims to make ethical design choices to combat the misuse of social media.