By the way, may I ask that you quit using the term "intellectual property"?
It's not property, it's a limited, exclusive right that can be bought and sold the same as a property. Theft is an incorrect word to use with copyrighted works, unless you're talking about walking out of Best Buy with a DVD under your jacket or falsely registering yourself as the copyright holder at the US Copyright Office. All you can do, and what you are talking about, is infringe on the copyright holder's limited copying and performance rights.
Rights infringement is not theft. Don't believe the propaganda.
The term also creates confusion. "IP" covers the following: copyright, patent, trademark and trade secrets.
The first two work off of one legal justification, while the other two work off of their own justifications. All four work off of widely differing laws and precedent. Specifically:
Copyright: Constitutionally authorized and restricted, incentive to an author allowed only for the promotion of the arts. Protects creative expressions. Was supposed to be for a limited term, now corporate-purchased politicians have made it effectively unlimited. Concepts such as fair use apply.
Patent: Same constitutional authorization, but for inventors, and still for a limited term. Protects specific implementations of ideas. Concepts such as fair use do not apply.
Trademark/servicemark: Created to prevent consumer confusion and misuse of consumer trust in one company or product. Unlimited term as long as it is continually used in commerce. The same mark can be used by multiple companies for different products or services and not infringe on each other. Concepts related to fair use, usually in a First Amendment sense, apply.
Trade secrets: There are various state and federal laws punishing the misappropriation or release of trade secrets. Unlimited term, but depending on the circumstances, anybody's free to use it once it gets out or is reverse-engineered.
Over and over and over I see people confusing these concepts. It is much better to say copyright, patent, trademark or trade secret.