Google has these signs up at their offices sometimes, they say "Stop: Google employees only beyond this point." I've never been beyond that point but you can guess what is beyond that point. In reality, most of the signs mean that a Googler has to accompany an non Googler past that point. Or maybe this sign is more extreme and doesn't even allow that to happen.
I am pretty sure I've seen this sign the last time I was at the GooglePlex, which was about six months ago.
This picture was shared by Googler Richard Hay on Google+ with some inside joke to someone who doesn't appear to work at Google.
This post is part of our daily Search Photo of the Day column, where we find fun and interesting photos related to the search industry and share them with our readers.