Edit: My tone here is a little combative. Sorry, it's not intended as an attack on you.
If it's so hard to study, for example, the climate scientifically, then it must be orders of magnitude harder to study something like the effect of pornography scientifically. I simply don't think it's a scientific question.
That's not to say that the article should be confused for an academic study of any sort, but it's certainly useful insofar as it will encourage some readers to think about a specific aspect of pornography prevalence that they'd never thought of before.