Mass. Gen. Laws ch. 268, § 30: Disturbing correctional institutions or jail; attracting attention of, or communicating with, inmates

Section 30. Whoever wilfully disturbs any correctional institution of the commonwealth, the Lyman school, industrial school for boys, industrial school for girls, or a jail or house of correction, or in any manner seeks to attract the attention of, or without the permission of the officer in charge has communication with, an inmate thereof, shall be punished by a fine of not more than fifty dollars or by imprisonment for not more than three months.