You should probably not add “No Title” to your titleless “IndieWeb” notes. Even if your site’s front end doesn’t show these “titles,” your RSS feed still might. Which would cause feed readers to display these notes as “articles,” i.e., with a title (equal to “No Title”).
One response to “You should probably not add “No Title” to …”
Most feed readers support empty or missing title elements just fine. Or, you could have your items’ titles be a (truncated) copy of their content. At least some readers detect that, and (correctly) assume notes.