We have scorpions here on our hill.
The DE is sprinkled near all doorways. Any stinging scorpions that do get inside have all been very sickly, not very spry or acting like they are able to move at all. Highly recommend it. Downside is you have a powdery substance around your doorways that gets on your shoes and tracks in the house. Still better than chemicals.
I’d much rather have powder than poison tracking through my house...:)