well, I see the 'point',,,but it is simply fallacious reasoning in this case...(equivocation, assuming the premise, and a couple of other fallacies, if I can think of the technical terms)..dog-poop as 'bad content' is NOT an equivalent term to "moral stuff" as 'bad content'...and it requires you to ASSUME that "moral stuff" is automatically 'bad' and cumulative...a debate which rages every day...

that being said...I DO agree that we are affected by what we see & hear, and that lots of exposure to unsavory themes can de-sensitize kids to them and allow acceptance of things we don't like...it is just that we can MEASURE and calibrate some things and not others....