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.
Robbery is a no-no.
But there are other prohibitions. Not paying our bills is a more subtle way of stealing, but stealing nonetheless. In both cases, I have found a way to make your property mine against your will. Either way, I have stolen the computer. It is simply not right for me to take someone else's goods or capital or labor without paying for it.