The module is m_nobots, which provides channel mode +B (can be changed in the module if desired) that blocks +B users from joinnig or messaging channels. I do understand this is probably a very simple thing to get around, but on some networks where policy is that bots must use +B this is a good module to have.
You can get a full description and module source on my Modules Page.
License: This module is released under the GNU Affero General Public License which grants permission to freely use, modify, and distribute this module with the following conditions:
- You must keep the module licensed with the GNU Affero General Public License, version 3 or newer.
- The copyright notice in the module must remain intact and unmodified.
- All creit must be retained in the module source and/or documentation.
- You must provide the module source (including any modifications) to anyone who wishes to see it.