For new, improving, and prospective module maintainers.
You're not forced to do anything. However, if you post it, you're endorsing it. At that point, you have some responsibility. You'll need to work with the security team on fixing vulnerabilities, and support your code. Clearly communicating your intentions to your users is good, too. Poorly maintained projects give us a bad name.
Best practices: Community Management
How to enlist help: