Those with food allergies need to understand that they are the ones with the limitations, not the rest of the world. Just because they have to live in bubbles doesn't mean we all should be. Also, there is so much evidence in the medical research communities that show, the more exposure to some foods as a child or infant makes for better immunities against common food allergies. 

Removing nuts from all restaurants will just propagate more nut allergies in the future.