Update: WebProNews contacted Google to find out how they handle Google Buzz spam. The company tells us:
"We have several spam and abuse checks in place for Google Buzz content. On the abuse side, we recompress images that are uploaded, and links are scanned by the same technology that helps protect Google web search and browsers that implement our Safe Browsing data. Users can also click "Report abuse" in the drop-down menu for each Buzz message. We will suspend accounts for abuse that violates our terms of service."