I care about property rights. I won't support a system that doesn't allow people to keep the fruits of their labor or won't protect their work as their property. It's up to the individual to decide whether he wants to forfeit his property rights, not the rest of society to force him to give his work away because you don't want to pay for his book. If you take without permission, you initiate force against that person, and the initiation of force is morally wrong. A system to prevent or allow for punishment of people who would take through force is appropriate.