The others have already mentioned it, but calling the cops wouldn't get anything done. Some criminal actions will never get prosecuted, just because of their nature. In my state, walking on the left side of a crosswalk is illegal (it's in the traffic code, so very minor). You think any jury would convict for that?  In this case, the jury would be easily convinced it's police abuse of power to do anything, and the violation should be ignored. Before that even, the judge would stare at the officer and ask if this was worth their time. Before that, the prosecutor might even simply dismiss the case; before that, the sergeant....etc. So taking action for making the kid buy cigarettes isn't feasible.  As far as taking the child away, that's not police, unless it's a very clear and present danger. As far as I know, no child has been taken away for someone smoking (cigarettes; marijuana is different, obviously - shouldn't be, but is) inside the house near the children. This is, sadly, one of those actions that society lets slide.