The New York Times is relying on their audience's ability to understand that plants are not conscious beings. "Mournful cries" is just an evocative way of describing the auditory signals plants produce under stress—which the article makes clear. I can't understand what's so "deranged and insane" about some stylistic flair.
>plants are not conscious beings.
Is that founded on a basis of scientific fact, or Human Superiority Complex?
I don't know about you, but I already feel enough guilt about how we eat animals. I even feel bad about throwing away a stuffed animal. We don't need some journo shoving another knife through our collective hearts about eating vegetables.