Good advice, but there's one point needs highlighting. Copying without permission is definitely wrong, but it is not theft.
Stealing something means taking it from the legitimate owner without permission and depriving the owner of the use and enjoyment of their possession.
You mentioned how you might feel if someone stole your car. That's theft, because you no longer have your car.
Copying is different. If someone copies a story of mine, it is still right here on Medium, earning me money with every read. I haven't lost my story.
It has been copied, and that is copyright violation and there are legal remedies for that, but it is not theft, and the pedant in me always winces when I hear this.