Thanks for your response.
I am trying to find a convenient way for people to post comments to most articles on my site. You have pointed out that allowing the public to directly post comments without registration is probably unwise. And I agree. Therefore, I should at least have some sort of screening mechanism in place to reduce rubbish postings if not require users to register.
This (James Bond) site has a neat post-a-comment feature, but I think the site is powered by some content management system:
But I am rather reluctant to install a CMS just for that one feature. Is the other option to use a form-email script, and just manually insert the the approved postings to relevant (static) HTML pages?