Sometimes there's something I want to write, where I would be perfectly happy for whoever happens to read it on Less Wrong and is interested in who the author is to check and see it's me, but I don't want the post to appear in search results for my name.
I also don't want anyone who opens my profile on Less Wrong to see the post.
There could be various reasons for this - perhaps I'm about to claim that tabs are better than spaces and I don't want potential employers to see such heresy if they search for me. Perhaps I'm asking for suggestions for my wife's birthday present and don't want her to find out what it is.
My suggestion is to allow posting semi-anonymously. The name that would appear on such posts is "anonymous" but the name would be a link to the author's user profile. The post wouldn't appear on the users profile, but any votes would change the users karma as usual.
Perhaps it should only be possible for a user with sufficient karma to click on the link to the user profile, so that some bad actor can't scrape all semi-anonymous posts and publish the author's names in a searchable format, or at least if they do it should be straightforward to detect and block that user.