First of all, stealing things is not morally or ethically, the right thing to do. At a young age, people learn that taking things from other people without their permission is not going to be accepted as good behaviour. It is important to know that if something isn’t yours, you do not have a right to it. I’m pretty sure even in the bible it says; “thou shall not steal.” If you know something is going to be frowned upon if done, or that you would be frowned upon, upon participating in something, you simply should not partake in that action.
Another reason stealing should not be performed, is because it is unjust. Just like Antoine Lavoisier's Law of Conservation of Mass, to gain something physical from one person, means that person must have lost something. Stealing money from someone means that the amount you took is the amount they lost, and they have to make up for that loss somehow. This is not fair, because the person earned that money themselves, and should not have to work extra, to accommodate more than just them. The effort they are making for the money is not equal to the effort the thief is making, which is unjust.
Thirdly, people should refrain from robbing others, is because what comes with crime or bad behavior, is consequences. Stealing is obviously against the law. If caught doing it, it could cause you to have that on your record and this could hinder you from getting a job, etc. Not to