Happened to be in Boston yesterday and this billboard caught my eye.
The billboard in general irritated me given the ATF's responsibility in the recent gun sales to Mexican drug cartels. I'm not entirely sure what the private sale laws are in MA, but I do know its still pretty draconian and requires both buyer and seller to be licensed by the state. Not exactly a loophole. Not to mention that the group's main argument seems to be about preventing accidental shootings involving children, which no amount of background checks is going to solve.