I want people's feedback and questions. I want that feedback, questions, and their answers, to be public. Email is private which means if one person asks a question my answer has to be repeated for each person. As comments on the blog others can read the the feedback and responses.

As for spam, I've had very little spam since being on disqus. (~10yrs?) memory might be bad how along ago i switched to disqus. I will keep on using them.