undercover: I heard that at one convention that myriads upon myraids of the brothers were walking across the street to a McDonald's during lunch. People from the company that held the concession rights to the coliseum saw the crowds of JWs in line at McDonald's and complained to the city. The WTS leases the venues needed without concessions by saying that foodservice would not be needed. But then literally thousands are in line at a fast food joint across the street during lunch. If I held the concession rights to the coliseum I'd be pissed too.
I am sure that is what is behind the prohibitions at the convention here in town, too. The society does not want to open the facility to "worldly" vendors, so sends the concession vendors packing. People do what people do and descend on every vending maching, convenience store, and fast food place in a one-block radios. The contractors, out a revenue-generating weekend, protest.
Another rule
Pack your own lunch but don't bring a honkin' cooler that will block the aisles.
Hubby has purchased a couple of theocratic lunch bags just for the purpose. Has anyone else wondered at the oddity of thousands of people eating alone? No sharesies? (Acts 2:44-46)