I passed the bacio di latte and saw some people bu...

I passed the bacio di latte and saw some people buying ice cream and eating in the hall and sitting on the bench in front of the store. I decided to buy one and go out to eat. I bought it and when I left the door was closed. I sat on the bench and shortly afterwards the security guard came to tell me that I could only eat ice cream outside. I went around to find a way out (with the ice cream melting) and outside I started to take what was left, when another security guard came to tell me that I couldn't eat ice cream outside. Why was the ice cream shop selling ice cream other than to go? Why did they let other people eat ice cream before and after what happened to get me and other people to think it was allowed?