Should we tell our kids not to tell on others? If so does that mean it's ok to brake the rules as long as you don't get caught? So it's okay for kids to break the rules you set, even rules that aren't about safety like "brush your teeth before you play with the iPod," as long as they do it without your knowledge?

Should we tell our kids not to tell on others? If so does that mean it's ok to brake the rules as long as you don't get caught? So it's okay for kids to break the rules you set, even rules that aren't about safety like "brush your teeth before you play with the iPod," as long as they do it without your knowledge?