Police Enforcing the Ontario Temperance Act, Toronto, 1916.
But the laws were often enforced, though one might never think so from the stories one hears about prohibition days. After all, stories about law breaking make better telling than ones about law enforcing. However, there is no way of knowing for certain whether alcohol consumption declined in those years; bootleggers don't keep records. All that can be said is that if prohibition didn't work as well as it was supposed to, it may have worked better than is generally thought.