Should prisons exist
I think that prisons should exist because when the robbing people try and use their weapon on the person to get this and that, the police come and grab them and lock them up into the prison and they won’t hurt you. I think that the prisons should exist because the robbing people try and hurt you like other people, they might do the same thing again. If they try and do something else like run away then they might get caught because there might be security cameras around the shop or restaurant.
So if they try and use their weapon on that person then they might be injured and there's security cameras in that shop and the police comes all the way and they come grab them and lock them up in the prison for long until they behave good.
They might not do that again when they come out of prison because if they do that again then they might stay in there for longer.