Google Banning Sites That Use DMOZ Data...How Could They?

While perusing the WMW forum this morning...I came across a thread that peaked my interest - being that I am an active DMOZ editor...Google Banning Sites That Use Open Directory (DMOZ) Data

I am in favor of Google doing their best to "weed out" sites that have scraped DMOZ and skinned them for their own benefit (typically for SEO/link building purposes) to improve their SERPs...HOWEVER...how can Google ban someone's site when they do this themselves?

For example...Google Directory / DMOZ Directory

Makes no sense to me!