Then have something like lock on Twitter or "friends only" on fb
MOST people want to have the option to share their photos and stories with people they know, and not necessarily with the entire planet.
That's why discord is so popular. Each individual has full control over what happens in their "space".
ANY of the "front-ends" (like peakd or hive.blog) could implement an encryption feature that would scramble your posts on the public blockchain and still make them readable for people on your "access list".