I'm guessing trying to face away from people's faces probably helps somewhat, too? If someone breathes, sneezes, or coughs viroids in your general direction, I would naively guess it's riskier if it's in the direction of their face to your face. If it touches your back and neck, I'd imagine you're still at risk, but not to the same degree.

Can anyone verify if this logic makes sense? Or does it not really make a difference because it'll just float through the air and reach your face anyway?