Finjan and home encoding

I use Finjan Secure Browsing so that my google results are classified as safe or dangerous. It seems to me that by far the most common warning on dangerous sites is Potentially malicious behavior was detected on this page with Code Obfuscation (Home-Encoding) as the Technical Information.

Now, I can understand that deliberate obfuscation of code could signal a serious threat but why is home encoding rated as obfuscation? And should I take this warning with a pinch of salt; in other words, are Finjan simply playing safe?

 

I'd guess that "Home Encoding" means hand-crafted JS.