You are the one claiming there's a problem, and you are the one (presumably) demanding legal and other action to deal with that "problem". That means that any burden of proof is 1000 percent on you.
... and before you haul out crap from BYU or whatever, be aware that some of us have actually read that work and know how poor it is.
I hear this claim from the pornsick but I’d like to see all the studies backing it up.