Leaving comments on websites that don't allow them - MOOOS.

A website from Japan. Its creativity lies in the ability to add your own comments to webpages that do not provide a comment box. You just need to copy the webpage URL to this site, and then add your comments. The full name of this service is MOOOS -Open message boards-β. Using this service does not require registration, and you can also subscribe to the RSS feeds of comments from various websites.