There are true risks when ... enough peanut protein is really being disturbed. So if people are cracking open peanuts, especially in a confined space, a waiting area of a restaurant, you could have a very severe reaction because there's enough peanut airborne there.
It is common because of an ongoing dislike of peanut or an ongoing fear of a reaction. That is reasonable because there is a risk of recurrence and reactions could be worse.
The exact mechanism by which peanut allergy may recur is not known, but we know that the children in our study who ate concentrated forms of peanut frequently had a considerably lower chance of having a recurrence of their allergy.