After a few of years of food being stolen from a shared refrigerator (it is located in a lounge outside of the main office), I think I caught the offender. We thought it was an employee from another office that shares the same building and lounge but the culprit is in our own office. Basically, some of my food was eaten and I said "hey did you try some of this?", this person replied "no" and I started ranting that meant that some stranger in the bldg was messing with my food. About a minute later, this person comes to my office and says, "uh yeah, i ate it" . This same person likes to dig through everyone's trash can to recycle cans and bottles (that's ok) but also picks out food (half eaten bags of chips, old candy, etc.) and eats it . This person also takes old post it notes from the trash to reuse them to send documents around in the office. It's not like our company limits our supplies, there is PLENTY of new post its and supplies in general. Is this just strange behavior in general? Should this person be confronted and what would you do?