It seems not important to log in to the platform, as all content can be read without doing so. However, you can only write something or comment on what you read if you log in. Without logging in, the platform will remain a one-way stream of information, which is what we hope to avoid.
Second, you cannot read comments people make without logging in.
If you log in for the first time, most browsers (explorer, google chrome, etc.) will give you the ability to save your log-in name and password. If you do this, you will not have to re-type your name and password every time you log in. Simple, safe, and easy.