From what I have read over the years there are no documented cases of death by inhallation because someone nearby was eating peanuts. It's always by ingestion or by touch. Soemone who ate a peanut gives the person a kiss, or shakes their hand, or the allergic person touches a surface with peanut residue on it and then touches their lips or eyes.

I am very sensitve to allergic issues, my mother has been to the hospital several times due to her allergies to aspirin and to corn combined with asthma and a severe cat allergy. Every time she's had an attack it is because a restaurant employee or well intentioned but uniformed friend told her an item was corn free and it was not. She does not go thru life expecting the world to be corn free but she rarely eats anything now that wasn't prepared in her home or by someone very aware of her situation.