In Intellectual Products and the Right to Private Property Tibor Machan takes a thoughtful look at the anti-intellectual property arguments. Worth a quick read.
Is it the point of those who deny that rights to intellectual property are possible that when people produce their intentional or deliberate objects, such as poems, novels, names, screenplays, designs, compositions, or arrangements, these things cannot be owned? But this is quite paradoxical.
The central issue is, instead, whether when someone produces or creates a work—poem, novel, song, arrangement, computer program, game, or the like (excluding all discoveries)—he or she may be deprived of these without permission? I think not.