Do iron filings in a humidifier actually work?

[MetalHeaded]

Saw a fella on the east coast running a humidifier full of diluted iron filings as an airborne deterrent. Claims it keeps weak spirits at bay.

This real? Or am I about to destroy my lungs AND my appliances?

[WickerMan]

To answer your questions, Yes. Yes it will likely deter many creatures. Yes it will destroy your lungs. And Yes it will harm your appliances.

If spritzing iron infused air around actually works, I wonder if iron or salt infused paints will work as well.

Or maybe we should all go back to having tall iron fences around our property again.