Nut dust can float impressively far. But you need to be on the extreme end of nut allergy for that to be a risk. There's tons of published research about it and the risk is SUPER small. Most people with nut allergies just have PTSD and are overly cautious. Which isn't a bad thing as long as they're not letting it ruin their lives or using it as an excuse to make other people miserable (like pushing to ban pb&j in schools 😒)