Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 131, § 5C

No person shall obstruct, interfere with or otherwise prevent the lawful taking of fish or wildlife by another at the locale where such activity is taking place. It shall be a violation of this section for a person to intentionally (1) drive or disturb wildlife or fish for the purpose of interrupting a lawful taking; (2) block, follow, impede or otherwise harass another who is engaged in the lawful taking of fish or wildlife; (3) use natural or artificial visual, aural, olfactory or physical stimulus to effect wildlife in order to hinder or prevent such taking; (4) erect barriers with the intent to deny ingress or egress to areas where the lawful taking of wildlife may occur; (5) interject himself into the line of fire; (6) effect the condition or placement of personal or public property intended for use in the taking of wildlife; or (7) enter or remain upon public lands, or upon private lands without the permission of the owner or his agent, with intent to violate this section. The superior court shall have jurisdiction to issue an injunction to enjoin any such conduct or conspiracy in violation of the provisions of this section. A person who sustains damage as a result of any act which is in violation of this section may bring a civil action for punitive damages. Environmental protection officers and other law enforcement officers with arrest powers shall be authorized to enforce the provisions of this section.

This section shall not apply to the owners of the lands or waters or tenants or other persons acting under the authority of such owners of the lands or waters.