According to local legend, in New York, it’s still illegal to put an ice cream cone in one’s back pocket while in public on Sundays. As the story goes, this law was enacted to prevent thieves from subtly luring a horse away from its rightful owner before the dawn of the motor vehicle. Though silly, this example is indicative of a larger trend: old laws from the 19th and 20th centuries often remain on the books because it’s more of a hassle to repeal them than to simply stop enforcing them. This can happen as social norms change, or as new technologies eclipse old ones.