Section 127. Whoever violates any provisions of the seven preceding sections, shall, unless otherwise therein provided, forfeit not less than three nor more than fifty dollars. Whoever wilfully injures or defaces any such drawbridge or wharf or pier appurtenant thereto, or any railroad bridge, wharf or pier, shall forfeit not less than three nor more than fifty dollars. Whoever, without the consent of the draw tender, opens or wilfully obstructs the draw, or wilfully makes fast or moors any scow, raft or other vessel in such manner as to obstruct passage to or through said draw, or wilfully hinders a draw tender in the performance of his duties, shall forfeit not less than fifty nor more than one hundred dollars.