There are a few of them, example: Click on the 'Users' tab and sort by name, they show as "unknown (Google), however they don't show up when you filter the user results.

Some of them even [post replies](https://superuser.com/questions/20972/what-else-do-linux-distros-need-in-order-attract-the-non-geek-user-groups/21564#21564), which read very human and sane.

Are these just normal users going through a Google service? Also I did try look for this answer before posting. Thanks for any explanations.