Anything [they] push, whether it be porn, gluttony, materialism, etc - anything outside what is considered normal human bounds (and every human innately knows what are "normal" human bounds if they are truly honest with themselves) - you can know that the thing [they] push is destructive to mind, body and spirit. [They] do nothing for human good; [they] want to kill your body and enslave your soul.

In essence, if [they] push it, reject it. Simple.