Privacy of messages and deletion reporting protocols

I would like to point out that, with this plugin, a private/direct message is not reported in a particular way and therefore, once published, it loses its privacy attributes.
Also, if the user deletes the message, the unsubscribe message is not accepted by the plugin and the message still remains crystallized for eternity in the form of a comment in the WordPress blog.
This of course happens even if the message is a direct message, therefore the highest standard level of confidentiality existing today in the social networks of the fediverse.
Having said that, for a principle of caution related to privacy, I will disable the plugin pending further changes; however I believe that the activitypub for wordpress plugin is a beautiful project and that it deserves further development and possibly further financial support; in fact, the path taken is good and contributes to making the web more beautiful and similar to the decentralized spirit of the origins

The page I need help with: [log in to see the link]