Or maybe she wanted to portray how self serving and materialistic society has become, innocent children growing up to become adults locked in there own little world, despondent to the poor and needy, watching us all the time through her self portraits and in the ultimate form of art, she placed her pictures in lockers that would be easily found, so when they would be found people would squabble and trade over the treasures, she herself would die with dignity, penny less with out fame or fortune, pure and the best bit, cause she purposely didnt leave an heir or will, the treasure will have less worth, and become a poisoned chalice......bloody brilliant, makes Banksy look like an amateur.