It has been for 30 years but recently they took a vote to lift the ban...It failed. They were afraid if they lifted the ban it would lead to prostitution and child deliquintcy.
This is a state that likes to tell you how to live...must wear a helmet on motorcycle, must wear a seatbelt, must not own pinball....it's for your own good..You'll thank us later.
http://www.joystickdivision.com/2011/05/marshfield_ma_upholds_video_ga.php