Today we're beginning to support authorship markup—a way to connect authors with their content on the web. We're experimenting with using this data to help people find content from great authors in our search results.

We now support markup that enables websites to publicly link within their site from content to author pages. For example, if an author at The New York Times has written dozens of articles, using this markup, the webmaster can connect these articles with a New York Times author page. An author page describes and identifies the author, and can include things like the author’s bio, photo, articles and other links.

If you run a website with authored content, you’ll want to learn about authorship markup in our Help Center. The markup uses existing standards such as HTML5 (rel=”author”) and XFN (rel=”me”) to enable search engines and other web services to identify works by the same author across the web. If you're already doing structured data markup using microdata from schema.org, we'll interpret that authorship information as well.
Official Google Webmaster Central Blog: Authorship markup and web search

Another genius idea from Google that will allow scrapers and Co to steal contents and pretend that they are the authors or copyright owners via digital tag.

Does it means that they don't know who is the contents owner?