Sheet cakes were snuck in through exit doors that had been propped open. Most else is usually creatively brought in concealed in a diaper bag or large purse...or just straight up carried in and nobody cares enough to stop it lol

Possible, but I doubt it. They're pretty common issues tbh (well maybe not the sheet cake thing).
Other fun things found: countless adult toys, pants (both soiled and not), wii-mote, bucket from another cinema containing vomit

True story: this would not surprise me. Buckets of chicken, cartons of ice cream are frequent finds. I've had to bust guys who *repeatedly* sneak in boxes of donuts or sheet cakes that they try to sell during shows. Full watermelons, mom's spaghetti, succulent Chinese dinners...all common.