Ooh and I can dbl like as an anonymous user.
Given the somewhat sensitive nature of data science in various organizations — including US gov departments — TLS/SSL has to the only accepted way of sign-in and, heh, discourse.
Also: Chrome is going to really light a fire on login dialogues that aren't SSL'd, soon.
The site also uses Discourse CDN and it would be much safer for individuals re:tracking if it was all local.