The person who posted this question has experienced a company kitchen that gets cleaned regularly -- I'm not that lucky. I wouldn't touch any free food that was placed in the kitchen on our floor of the building.
Occassionally, people bring in cookies / candy / donuts / etc, but those don't get contaminated by placing them in the kitchen.
The kitchen is the place that you go to play 'guess that smell' ... last summer, a few of us took it upon ourselves to try to clean out the fridge and disinfect everything. We found multiple items more than 5 years past their 'use by' date. (mostly assorted condiments, a can of slim fast (1999) and various green things that looked to have once been restaurant leftovers.)