I shouldn't drive off with your car. You shouldn't grab the purse left in the coat room. I don't enter your house when you're gone and walk off with your stereo. You don't pickpocket me or take my garden hose or ride off on my bicycle. I don't shoplift.
Theft is simply wrong.
We should have learned that at our mother's knee. Not only do we take what is not ours, but we do it by force and fear. So the 8 th commandment also prohibits going into a bank with a gun and walking off with the tellers' money. I don't stick a knife in your back and relieve you of your wallet. You don't carjack my daughter's car.