I am very shocked to see this in the ToS for the flagship Mastodon instance, promulgated by the Mastodon nonprofit.
To be clear, I think this is *much* worse than, say, requiring users of mastodon.social to agree to have their posts used to train LLMs. The harms of having your work fed to an AI are mostly hypothetical and relate to moral qualms.
By contrast, a binding arbitration waiver would literally allow the management of mastodon.social to cause your DEATH and face no consequences.