Yep, I was surprised the Security Guards nearly tackled the guy and ended up yelling at him over a banana after a buffet, but according to Google, taking ANY food out of a buffet, even something as relatively small as a single banana is considered theft like if you were to go to a grocery store and walk out with a banana without paying for it.
I didn't know that taking food like banana out of a buffet was considered theft. I could see taking a full plate of food like pancakes, sausage, and eggs out of the buffet would be considered theft, but I didn't think taking a single banana out of the buffet would be considered theft as well.