Anonymous commenting is highly discouraged. Rarely are anonymous comments thoughtful and constructive. Most are 'hit and run' and just plain irrelevant and/or nasty. I'm not going to post them.
Signing on with Google is easy and free. It will be automatic once you have an account. If you don't want to sign up with Google, just sign your name. However, to be clear, just because you have signed your name doesn't mean a comment will be posted. This isn't You Tube. I do review every comment.