This extension prevents you from replying to a topic consecutively by the same user, before other users have responded.
- Quick reply
- The "Post Reply" button
- The "Quote" button
It also displays a warning bar in red, where he explains to the user that are not allowed consecutive answers and invites him to edit his previous message.
1.Download and unzip the current release.
2.Upload the extracted package in to the ext directory of your phpBB board.
3.Navigate in the ACP to Customise -> Manage extensions.
4.Look for No Multiple Replies under the Disabled Extensions list, and click its Enable link.
Enjoy... No ACP configuration needed