Intellectual honesty and the ethical requirements of blogging

If you decide to comment in the public sphere about either (1) the specific views of particular others, or (2) the views of a certain general family of views ("the libertarians" or "left liberals"), you have an ethical/moral responsibility to get those views right, to put in the time and effort to understand the general claims and arguments, and their underlying bases and fundamental commitments.  If you cannot do this, you ought not comment.  If you nevertheless do so, whether in an academic article or in a blog post, you are ethically/morally blameworthy.