hey i think fan deatch kill is very danserous.
The only threat I can think of is if the fan was pointed straight at you and while you sleep as you turn and rotate the wind could be angled towards your face impeding you able to breathe in air.
It also acts as a way to ventilate the air and have a constant airflow preventing any gases building up. The only problem could be if the motor of the fan is overworked or ignites for some weird reason but that seems unlikely but it is probable.
It seems like it is something which is endorsed by the South Korean government and I'm not sure if it is supposed to be a gimmick to reduce energy use in the country.
South Korea is known for it' progress in technology and its beautifully lit up city with many illuminating billboards.
That is not a threat though. A normal electric fan that you use in your house cannot impede your breathing - it is just not powerful enough.
Yes I think that was suggested as one possible source of the idea being perpetuated but I have not seen any direct evidence of it.