Or, more to the point, if you steal a picture and get caught, should the owner of the picture be able to charge you what they want, or should you only have to pay whatever you think is reasonable? The Guardian obviously believes the latter, though they probably have a wee bit of a vested interest in not paying whatever a photo’s owner wants.
See the whole series:
http://www.guardian.co.uk/technology/2008/nov/27/internet-photography