that is not life threatening but i do mention it if i need to at a restaurant. Im allergic to kiwifruit, it makes me break out in painful hives from just one slice. If i am ordering at a restaurant i ask the waiter about the meal, and i mention the allergy if needed especially if im ordering a dessert/fruit saladand if there is any hint of kiwi fruit then i will order something different. So it makes me very conscious of food allergens in general and if there is some way i can help somebody else when im preparing the food then i will, if im not sure then i will tell them but i would never be rude to them and tell them to leave.
I cant use it in any food that i prepare and when ever i start in a new kitchen i mention it. Mindyou these days kiwifruit is not used nearly as much as it used to be thank goodness, for a while there it was like a compulsory garnish