Returning to the “secret free space dedicated to something beautiful carved out despite the modern-day surveillance state” beat, a group of clandestine culture warriors secretly established a workplace/crashpad in France’s landmark Panthéon, where for a year, completely unbeknownst to the facility’s security, employees, and visitors, they labored to repair its antique clock. Nicest secret society of pranksters ever? (Via Bruce Baugh.)
That reminded me of this, which you might have already seen:
http://www.boingboing.net/2007/10/02/artist-gets-probatio.html