That might be the case in the UK, but it's definitely not in the US. People didn't get serious about avoiding drinking and driving until the punishments got ser

That might be the case in the UK, but it's definitely not in the US. People didn't get serious about avoiding drinking and driving until the punishments got serious. It still wouldn't be considered honorable here to turn in a friend for drunk driving (unless it was obscenely over the limit). It would be mainly considered a failure of friendship that you didn't confront them and instead called it in. Even in rural Ireland there was a relatively recent backlash because they could keep driving home drunk down the side of the road with the hazard lights on. Also, with a 12-month ban in the UK, they must not have been enforcing it much because it wouldn't take long to have most of the drunk drivers banned. So my suspicion is that enforcement increased as well. People rarely fall for propaganda alone when there is nothing that makes it concrete.