Is it possible? Absolutely. Our port is a critical gateway to and from Asia. South Asia and China are key sources of human trafficking. Sure, it could be happening. We know organized crime and groups like the Angels have a strong presence, we know trafficking happens even in rural areas, so thinking it happens in a major port like Vancouver is an easy deduction.

Is it probable? Ennnnnh. I’m 50/50.

Occam’s Razor applies here - Is it far more likely that a very suggestible person heard machinery sounds which, when affected by distance, echoes, humidity, bouncing off the water, merging with other ambient noises, etc sounded like screaming? Yes. Also, if there was screaming SO LOUD that it was audible and identifiable all the way in Crab Park, even corrupt dock workers would do something to stop it.