At least cockroaches don't bite. We got an Airbnb once in Belize that was effectively open air (it was too hot otherwise and there was no A/C) and the bed had mosquito netting around it which didn't go all the way to the ceiling. The host said "Oh just use the fan. Mosquitos hate fans." Of course the fan didn't work. We vacated that place quick. I still don't know whether this was a scam or simply a case of the locals being completely used to something an out-of-town guest would find horrifying.