In 1971, Boston After Dark (the alt-weekly that would eventually become the Boston Phoenix) investigated a particularly whimsical outburst of art activism: Way before the days of Banksy, six rogue Boston artists invaded the MFA's men's room, transforming it into a makeshift gallery. They smuggled in their own work -- via the "Is that a painting in your pants or are you just happy to see me?" method -- and converted the lavatory walls into "the only place in the Museum that exhibits contemporary local art."