Comments that are too short often add little or nothing to a conversation. The focus of “Short Comment Filter” is to automatically filter out comments that are too short.
- Filter by word or character count
- Set the minimum comment length
- Choose whether to delete or spam short comment
- Decide whether to filter comments made by registered users
- Specify a custom message to show if the comment is too short (use %type% and %length% for dynamic messages)
You can visit the WordPress.org page to download Short Comment Filter. You can view the source on GitHub