Whoever intentionally and without right injures, destroys or molests any signal of a railroad corporation, or any line, wire, post, lamp or other structure or mechanism used in connection with any signal on a railroad or destroys, or in any manner interferes with the proper working of, any signal on a railroad, shall be punished by a fine of not more than $500 or by imprisonment for not more than 2 years.   [PL 1987, c. 141, Pt. A, §4 (NEW).]