When you visit those Magic Kingdoms Disney built you expect to have a safe, immersive and enjoyable experience in a controlled environment where the worst you'll have to deal with are the long lines.
And aside from the rare incident Disney truly delivers on these expectations, but only because they strictly enforce a laundry list of rules guests are told about at the gates and expected to follow.
Want to bring your own food into the park? They'll allow it as long as your suitcase, cooler or backpack isn't larger than 24X15X18 inches, and as long as you don't have any booze or glass containers larger than baby food containers.
Guests are also forbidden from bringing balloons into the Animal Kingdom park in Orlando, and they can no longer bring selfie sticks into any of the parks, which is a nice addition to the rules.
Not nice is the fact that a visible tattoo or article of clothing deemed inappropriate can get you kicked out of the park, but that just goes along with their no profanity rule in keeping the parks family friendly.