How to politely and effectively persuade tourists to stop uncivilized behavior?

In fact, the emergence of every uncivilized phenomenon is directly related to the education level they are exposed to and the environment in which they live every day. For example, if a tourist brings a child, you can tell him that you said the child is here. Please observe the whole rules and order and set a good example for the child. In this case, I believe he will set an example for his children and he will end his current uncivilized behavior.