If you land on the main page and think that you need to login there, you don't have to. Just follow the Discussion forums menu link (forum index), or click on one of the forum topics (those come straight into the sanctuary forum). If you need to login for the forums at all, you'll do it in the forums. Only article contributors need to use the login for the main journal. If you want to comment on an article (below the article), you don't have to login.