Shea Field Level Food Court Not for Everyone

If you don't have a ticket for a Field Level seat at Shea, you're can't go to the Field Level concessions! What the?! The guard who stopped me (me! a girl, alone, seeking food) did get a Club Seats waiter who told me he'd bring me something if I stood and waited, which was a kind gesture, but no one would let me in to check out the goods. Were they worried the 8,000 guards by the seats would not be able to stop me if I tried to sneak in to the field level? Does this happen at other ballparks? Yes I'm thinking of Tropicana Field, those meanies not giving me a cowbell. Is Yankee Stadium the most egalitarian ballpark in baseball?