Okay, we all know that shoplifting is a crime - but what about the reverse: shopdropping (or droplifting) where you go into stores and actually put things onto the shelves. Is that a crime?
Here's a neat article on WebUrbanist about the strange (performance art?) act of reverse shoplifting:
Shopdroppers have their own reasons for doing what they do. Some are social and political culture jammers who want to raising awareness about consumerism or adding warnings to dangerous products. Others seek to promote their own product, such as an album left in a record store. Still others do it for their own amusement and artistic fulfillment without expectations of any kind of return. [...]
Shopdroppers who are caught are variously freed by confused police or held on charges related to destruction of property or even fraud.