[ljm]

Peanuts aren't served on a plane just in case someone with a peanut allergy has a bad time as result. Peanuts (and other things people are deathly allergic to) are also not served or used as ingredients in restaurants where there is a risk of cross contamination.

What you've done is bring back the equivalence to a public place so that an absurd argument can be made about banning peanuts wholesale.

As far as any non-public situation goes, it's a simple discussion of consent and it's easy: just ask for it instead of feeling entitled to it.