FOSS is not a guarantee of privacy by any means. For example there is the confusion about mastodon / fediverse type social media and what sort of firewalls its

FOSS is not a guarantee of privacy by any means. For example there is the confusion about mastodon / fediverse type social media and what sort of firewalls its creates, for posts, for direct messages etc. I think FOSS means there is more transparency about what is going on, which is very important but not the whole story.