

This is a valid complaint in an ideal world, but in our current world this happens with every other site that has the same discussion model as lemmy. Your posts are not gone when you delete them on reddit. Reddit has a ton of mirrors and reddit themselves will never delete your post.
Personally I’d rather see lemmy grow as it is rather than die try the extremely tough task of building a good federated privacy protocol. The privacy on lemmy comes from being able to create an account while providing no info, being able to access from TOR. People seeing your public posts is debatably even a privacy issue.
The ability to block posts by keyword would be nice. The ability to merge communities and have lemmy move the subscriptions over to the merged community, mastodon does something similar with moving accounts so it is possible.