In novels, usually mystery novels, a "red herring" is an extraneous character meant to divert the reader's attention from the true killer/robber/etc. It is usually a logical choice for the culprit. A deliberately misleading object.
The "Red Herring" in this case is that tobacco advertisement divert the viewers attention with a good time rather than the longterm effects.
The film below is an interview I did discussing the key themes that I wanted the viewer to take away. This was filmed and edited by Spencer Copple and Derek Johnson.
