Actually, in law, there are all sorts of words for theft: Robbery, burglary, conversion, etc., all with nuances and tests to be met. If I walk onto your land with a chainsaw and cut down your trees and sell them for firewood, is it theft? No, it is conversion, because I have converted your property for my own use. If I take a potted tree from your porch and put it on mine is it conversion? No, it is theft. But if I enter your dwelling to steal that potted tree, it is something else again... depending upon whether you were inside sleeping at the time! Is moving a boundary marker a different crime than simply building on part of your land? Yes. Same effect, but different crimes against the owner. Most of us prefer the simple words of theft and stealing to describe people taking what isn't theirs. With copyright, proving loss of use and loss of income is harder... but if the artist was selling prints or doing commissions, there are some numbers which can be handed to the judge. Carolly