The Air Filters in Airplanes Aren't a Good Idea, Right?

i used to fly twice a week. I would open the vent and have the fan blow down to my right side to create a barrier. And so when the fart would come out, the air would hit it and push it away. It works. So i bring this up because i should be true for anything, including, you know, the dropletsyif you turn the fan on, you have it blown next to you, and you got a little wind barrier pushing away the air and s and air from other directions. The thenl these things are never going tochange. Outsideo the new society, we have to deal with, you know how they have thos? When you