You dont need to steal, most of the more popular 3d apps offer pretty much full versions for personal learning, Maya (Autodesk) for instance give away a full featured personal learning version, the only catch is it watermarks all your renders and it only exports non commercial file types. Paying good money for this software is worth it, it helps fund further development, and also you'll be more inclined to work harder to make the most of the software if you had to work to get it.