How do you determine a users privacy requirements by site alone? The content does not imply relevance to privacy abuse; abusers come in all manners and may take abusive objection to content like w3.org that would to most people seem innocuous.
It's pretty easy when you are the person that made the website (like most personal websites).
Again, I am not advocating for not having HTTPS so I don't know why you think HTTP+HTTPS is less private. It is exactly as private only it is also human readable and requires no centralized authority's lease to be visitable.