If the world becomes a place where we have to start eating arachnids & insects ... Then ...
It's the most abundant source of natural protein on earth and gives you more vitamins and protein per it's mass than any other animal.
Listen I don't wanna eat bugs either, but there's really nothing but psychological reasons not to.
The world being a place that eats insects wouldn't be of detriment to ANYTHING. Less pollution, less poverty, less starvation. There's pretty much no downside except cultural/psychological reasons.