I set this blog to where I approve all comments before they are posted. This is done to prevent spam. Rarely do I fail to approve non-spam posts.
I recently chose not to post a comment by a reader to my SSDI Threats post--http://rootdig.blogspot.com/2012/01/threats-to-ssdi.html.
The statements made by the poster were saddening. However, the comments submitted made it impossible to validate any of the statements and the poster apparently created their blogger account the same day they made the post.