This is also similar for other websites, but they usually auto-forward from http to https.
What's worse, trying to login via http just gives an error:
There seems to be a problem with your login session; this action has been canceled as a precaution against session hijacking. Go back to the previous page, reload that page and then try again.
When going to http://xboxdevwiki.net/, I'm not logged in. However, when going to https://xboxdevwiki.net/, then I have an active session.
This is also similar for other websites, but they usually auto-forward from http to https.
What's worse, trying to login via http just gives an error:
Also see https://www.mediawiki.org/wiki/Topic:Tvx6bgsxmwktdye9 - there's no hint to users, or administrators, about what's going wrong.