Since Elon Musk officially took over Twitter, numerous people have started taking a look at alternative social networking sites. One name that keeps coming up in this context is Mastodon, which runs on open source software. Mastodon consists of a network of decentralised servers (instances) on which users can log in. As a result, Mastodon cannot be controlled by a single company operating a s ...
Well IANAL, but the main concern raised in this article seems to be GDPR related questions of sharing of personal data. The GDPR however has a relatively narrow definition of what “personal data” means. Public posts are AFAIK not “personal data” under the GDPR.
To my knowledge Mastodon does not exchange “personal data” as defined by the GDPR (such as email addresses etc.) between instances.