Ananova - Thief 'drinks' work of art
I would say that this fellow privatized a public work of "art." Or maybe it was a form of art criticism.

An artist's latest work - a bottle of melted Antarctic ice - may have been stolen and drunk by a thirsty thief. Artist Wayne Hill filled a two-litre clear plastic bottle with melted ice to highlight global warming. But the artwork, valued at £42,500, went missing while on display at a literary festival, reports the Scotsman. Entitled Weapon of Mass Destruction, it vanished halfway through the Ways with Words festival at Dartington Hall, Devon.