So basically, all we have to do to change your thought of copyright infringement = theft is to legalize copyright infringement. Not the solution I would have chosen, but if that's what makes you happy... I still think you should not redefine judicial terms in your discussions with other people though. The argument was that if you chose to buy product B in stead of product A, you're depriving the producer of product A of a potential sale. If your about loss of revenue = theft were consistent then product choosing should also be considered theft by you. Since you limit it to those acts that are illegal, then all we have to do to bring you about is not make copyright infringement legal.