There is evidence: http://www.abc.net.au/news/2015-03-19/australias-plain-packaging-laws-are-a-success-studies-show/6331736 http://www.abc.net.au/news/2015-03-1

There is evidence: http://www.abc.net.au/news/2015-03-19/australias-plain-packaging-laws-are-a-success-studies-show/6331736 http://www.abc.net.au/news/2015-03-19/australias-plain-packa.... Also, people who carry armloads of cigarettes out of duty free do not represent the marginal cases this law is targeting.