Well you pretty much can't war in Boston (or hang Lite-Brites). However when it comes to near Boston there have been a number of wars in Milton. Other MA wars of note (that I can think of) have been in Lexington and Malden. Milton would be the closest to Boston but I don't have any reason to suspect that there will be any wars in Milton any time soon as the Milton Nerfing community is pretty much dead.