We just added two new buttons to the recently updated admin bar, both under “Blog Info.”
The first is “Report as Spam.” Occasionally a spam blog (or splog) makes it through our defenses and starts filling WP.com with junk. It’s hard to describe a spam blog, but you’d probably know it if you saw it. We treat these with extreme prejudice. In the past helpful community members like drmike have reported these through the feedback form when they come across them, but this button hopefully streamlines the process.
The second is “Report as Mature.” We try to keep the public areas of WordPress.com family-friendly, so if you come across a blog that primarily deals with adult topics you can report it using this button and someone will take a look at it to properly categorize it.
That’s pretty much it. Each of these systems is human reviewed, so if you’re not sure about something just submit it and we’ll make the final decision. Thanks for your help in keeping WP.com spam-free.