Penalties like this have always been out there and seldom are enforced. In my day, they were mostly used if the girl's father was prominent and the boy was from the wrong side of town, as it were. Although, I do remember a case where a girl with a bad reputation seduced and (some said on purpose) became pregant by, a younger boy from wealthy and prominent family. She was an 18 year old senior and he was a 15 year old sophomore when it happened. She was arrested and, until an accomodation was reached in which she went to a home for unwed mothers and gave the child up for adoption, there was pretty serious talk about prosecuting her for statutory rape.