The "Cloaca" exhibit at The New Museum of Contemporary Art in NYC 2002 used the guise of intellectual thought to get people to spend time looking at crap.

Cloaca is a giant machine that makes shit. At one end of the machine, they pour 2.6 gallons of water and a meal from a fancy SoHo restaurant. 27 hours and 33 feet later, a nozzle squirts out a well-formed piece of crap.

Cloaca is a computerized mechanical system designed to mimic the human digestive process. The machine, which eats better than the majority of us, chews the food using a meat grinder and a garbage disposal, then passes it through six reactor chambers that use various chemicals to do the job of a digestive system.

At 2:30 PM every day a crowd gathered and the machine dutifully dropped a shit onto a conveyor belt. The crowd went wild.
You could have bought your own vacuum-packed and sealed work of Cloaca "art" but they had a run on it and have sold out. www.cloaca.be