Most of the modern offices are using cubicles instead of full blown office for their employees. Cubicles do provide much less defense from the collegues’ intrusion. When someone with cubicle office has to leave for a business trip or vacation, there is no means he can protect his cubicle. And this is what can happen to it while unattended.
P.S.: The site is a bit slow due to recent popularity boost, so give it a minute or two.