Terpy, at the time that the picture was taken, the parking lot could be entered by nearly anyone who wanted to. I will remove it, though, until I can read through that section of the employee guidelines and see exactly what isn't allowed to be posted.
Edit: It appears to me that the guidelines only apply to confidential information. I can't imagine it possibly applying to that photo, since it was an observation of my own, and was taken in an open area. It appears that their policy is intended to cover against the posting of if, say, I knew for a fact that SoB was being removed, which I do not.