In his introduction to Edgar Allan Poes Dupin trilogy, Matthew Pearl offers in passing an interesting thought on copyright:
The brilliant resolution Poe designs for The Purloined Letter that the letter in question is right in front of our eyes the whole time, which is why the police cannot find it is also a perfect formulation of the odd version of theft that exists perhaps exclusively in the area of the law protecting artistic creations, which is known as intellectual property: that something can be stolen and in plain sight at the same time or, odder still, that in copyright law, for something to be considered stolen it must be in plain view. (p. xv)
(I think the connection to The Purloined Letter is a bit of a stretch, but never mind.)