Extreme profanity during trailer!!!

<p>I took my 14 year old son to watch the Jason Bourne screening at Gateway Prestige on Sunday. During the trailer for "Blood Father" we were exposed to a long tyrade of profanities - that one would usually associate with a 16 rated screening. Who controls the content of the pre-cinema screenings? Do you consider the audience that might be watching? Surely a 16 or 18 rated movie should not be advertised before a film targetting 13's and older? Or is the only way we can control this to stick alternative where we control the content? e.g. DSTV box office?</p>