I never said that people shouldn't culture black soldier flies. I think they're great if they're already found in your part of the world.
If there isn't a black soldier fly population where you live it's probably that way for a reason. Maybe they can't survive the winters, maybe they're out competed, who knows what the reason is. But, say they are out competed by some other type of fly. Now you set up a nice soldier fly colony and you've got thousands and thousands of soldier fly maggots. Many of these will escape into the wild. You're creating a place for them to survive the winter. I believe Soldier Flies breed twice a year. Weather isn't always the same and you could get a decent sized wild colony going within a very short time (that is one of the reason we love them right?)
I dunno... they could out compete nich species in that area. It's not just soldier flies.. it's that people are doing this with thousands upon thousands of creatures all the time. It's bad news.
