I’m not sure I understand this:
Thank you for your note. Please be assured that our robots do obey robots.txt files. We’d like to investigate further, but you have blocked us from being able to access your robots.txt file. Please note that when our robots see a 403 forbidden error, they interpret this to mean that the site is safe to crawl. For more information on this, please visit http://searchenginewatch.com/sereport/article.php/2164941
So a 403 means what exactly ?
Also, the full robots.txt is actually in the comments to the post they were told to look at. But they did not.