In the future the city of Gravity Fall becomes the statistically safest city in America. You physically can’t summon any demon besides Alcor and the various branches of the Pines Mob family consider it neutral ground and woe be tide anyone who violates that. which results in the crime rates being really low for a city it’s size of course your risk of spontaneously developing tentacles or something is way higher but plenty of people view that as a fair trade off.