The Most Expensive work of art

Background

Every year, thousands of trains are vandalized and cleaning graffiti costs Renfe, the main rail network in Spain, more than 15 million Euros, an expense we all as Spaniards assume since it is a public company. In addition to the cost, there are the delays caused by the removal of these trains for their restoration; the moments of panic that passengers suffer when graffiti artists activate the emergency level in order to paint in the middle of a journey; and the extra costs of increasing security.