Shocking experience with a rude and arrogant manager

As a regular Mcdonalds' customer, I walked in to have breakfast and have a meeting. Because the restaurant was full the gracious staff allowed me to sit in the kiddies' area as that was the only available space. I was later joined by another customer. As I was in the meeting a manager walked in and told me that I have 30 mins to finish what I was doing because he wanted to use the area for his meeting. When we told him that we had just ordered more food he told us we will have to leave or find another place to sit. After I asked him why is there no signage communicating this he stated that the below rules will be implemented very soon in all your McDonalds As a McDonald's customer, I am meant to order and eat my food within 45 minutes, thereafter I am required to leave the store. When I plug into your PowerPoint I am only allowed to use it for only 30mins.