I’ve opened up comments on the site so that you don’t have to actually be registered and logged-in to comment on a post. You are required to enter your name and a valid email address, and you can optionally specify your web site before you submit your comment. Of course, I still recommend registering or being logged-in if you are going to be a frequent visitor. Registration has its perks. 
I do realize, though, that “frequent” in regards to my visitors means once a week or so. Hey, I’m just happy you’re here. 