This article by @Renee DiResta about how she’s been blamed for being a CIA agent censoring the internet is worth reading. We’ve got real issues of free speech online but people going after her aren’t acting in good faith. 

In particular this quote really resonated with me. 

Censorship: “Strictly speaking, the term applies when the government prohibits or suppresses speech based on its content. Some people reasonably interpret censorship more broadly, to include when privately owned social-media platforms take down posts and deactivate accounts. But in Michael Shellenberger’s written testimony to Jim Jordan’s committee, merely labeling social-media posts as potentially misleading is portrayed as a form of censorship. Fact-checking, by his standard, is censorship. Down-ranking false theories—reducing their distribution in people’s social-media feeds while allowing them to remain on a site—is censorship. Flagging content for platforms’ review is censorship.”

This parallels the way in Nostr labeling, users being able to filter content, and relays choosing what content to host is censorship. 

https://www.theatlantic.com/ideas/archive/2024/06/cia-renee-censorship-conspiracy-twitter/678688/?gift=hQ-wAXx9vcfn6GAow-ESV4l120dfYQLPxUagepWugYs&utm_source=copy-link&utm_medium=social&utm_campaign=share 

 Touchy subject but I'll weigh in.  I think the "line" is restricting visibility.  Therefore downraking false theories is censorship, but not illegal if not done by the government.  But flagging posts or labelling them with additional information is not censorship, it is literally "more speech".  When done by a platform, it is the platform speaking, which they have a right to do.

I prefer a nostr system where we all flag each other, and we each get to choose whose flags we listen to or care about or display. 

 The difference between Nostr and other platforms is the control over the bubble you have. You can decide to leave the decision on relays (maybe not fully now, but those times will come) or you can build your bubble yourself... But in general you are not breaking someone else's printing press you are just choosing not to read their pamphlets. This has actually much more to do with the freedom of speech rather than with censorship.