Yet another sensationalist title - "World's largest venomous spider" - virtually all spiders are venomous. You might just as well simply say "world's largest spider", the meaning is essentially the same.
I hate it when spiders are sensationalised as more dangerous than they are. A goliath black can give a nasty bite, but isn't one of the truly dangerous species. Heck, a cat can give a nasty bite.
As for eating them, well, they're a resource in that environment, and protein rich. Why not?