Enforces the importance of following laws, since the consequences of breaking them won't be pretty. The Chapmans have strong family relationships. Dog is a colorful character who says what he thinks and isn't always PC. The behavior exhibited by suspects is hardly role-model worthy.
Chapman sometimes threatens to use force on suspects, and he'll hold down a suspect while he handcuffs him.
Fairly mild: "Goddamn," etc.
Drinking, Drugs & Smoking
Some of the areas Dog visits are clearly drug-infested -- and many of the people he apprehends are users -- but no use is shown.