Offering secure logins doesn't help verify someone elses identity unless the insecure interface is shut down. Just because you can login in via a secure channel does not mean that the person who posted a link to their code never used the insecure interface.

Are you offering to pay for the site certificate? If not, the site will probably have to run with a self signed certificate. Would that make you feel more secure? A self signed certificate wouldn't mean a whole lot more to me than what we have now.

For the most part, things that get posted here are small snippets that can be easily audited by any competent perl programmer in a few minutes. Links to larger things are provided but the authenticity of those providers is better checked in other ways than a secure login here (like MD5 signatures with a verifiable key).