If you follow people you don't trust to understand these mechanisms, and wield them accordingly, then maybe. But IF you understand how this works, the client wi

If you follow people you don't trust to understand these mechanisms, and wield them accordingly, then maybe. But IF you understand how this works, the client will never prevent you from reading something you would want. And it's hard-if-not-impossible to prevent the client from fetching a specific feed. So in that sense, no, not censorship. It is good practice on SSB though to make a comment on why you block a feed. There are many reasons, from NSFW content to actual harassment to simply spammyness being an issue when you replicate the entire feed onto a mobile device. Of course, that practice is not enforced by technical means. But it is still quite common. And in that case you actually get a notification.