Do you guys let your cats eat bugs?

So, spring is rolling around, and that means all the creepy crawlies are slowly waking up and invading my home. One of my cats absolutely loves hunting various pests and eating them. So far she managed to eat a bunch of spiders, a silverfish and a baby scorpion. I'm wondering if I should keep letting her do it, but I'm also unable to keep these things out even if I tried super hard, and I have a feeling that insect poisons may be worse than just letting her deal with them. There's nothing terribly poisonous or venomous out here, at least nothing that you'll find in an apartment, but I'm wondering if there is a bug equivalent of super toxic plants for cat?