Del. Code tit. 11 § 1320
A person is guilty of loitering on property of a state-supported school, college or university when the person loiters or remains in or about the buildings or grounds of a school, college or university supported in whole or in part with state funds, not having any reason or relationship involving custody of or responsibility for a pupil or student, or any other specific, legitimate reason for being there, and not having written permission from anyone authorized to grant the same.
Any law-enforcement officer, state official or employee, the owner or occupier of such lands or property, an agent or employee of such persons, or any other person or persons whom they may call to their assistance, may arrest such loiterer, either with or without warrant, either upon the premises or in immediate flight therefrom and, if with warrant, then at any place.
Loitering on property of a state-supported school, college or university is a violation.
11 Del. C. § 1320