Back in 2003, a small group of artists in the state of Rhode Island attempted a daring art hack: They snuck into the Providence Place Mall and hid an apartment in a corner of the parking garage as part of a guerilla documentary they were making on mall life. Michael Townsend and his cohorts, from all reports I've been able to dig up, set up a wall of cinderblocks which blended in with the rest of the structure to hide the 750 square foot chamber. A standard utility door allowed entrance and egress. The interior walls were also plastered and …