Bags I think contra-suggestibility, if I understand the term correctly, is responsible for the failure of many public health campoaigns, for example the campaign against smoking has not prevented a rise in the number of young women smoking.
How can doughnuts be equated with wine? And what's actually wrong with either of them? I wouldn't eat doughnuts because I don't like them very much, but in the context of a good balanced diet, even one doughnut a day isn't going to do anyone any harm. Just as one or two glasses of wine isn't going to, either.
The problem with this sort of thing is that it puts people off all public health campaigns, not just the one in question.