Bubble Gum is Forbidden
Rumor has it that Walt Disney also banned all Disney theme parks from selling chewing gum. This was to deter visitors from tossing their gum on the ground and dirtying the parks. It is small actions like this that make the parks seem like they exist in an alternate world, free of some of the troubles and cares of our reality. But none of these extra rules and procedures are directly responsible for the theme parks being free of mosquitoes.