They would drive animals off cliffs. That would cause horror if they were to repeat it today yes.
Just stop eating living animals it's that simple, but if you want to eat bugs, knock yourself out.
I think we'll find "plagues" of species more common and end up harvesting as many as possible then so that "locust" is the primary protein source for that year.
Its not that simple. I can see why you believe it is, and it probably helps contribute to why you have little empathy even for those who show you they physically cant.
Soon to be alternatives, which I'm all for. I was only pointing it out that it isn't exactly plausible for everyone, and arguing with someone who can't is not worth their time, or yours.