So, you punish the 99% of people who aren't allergic to peanuts and deny a life lesson for those who are:
You are responsible for your own health and safety. The world does not stop for you.
I believe it was this incident which prompted it: Mom who let 4-year-old eat PB&J in shopping cart branded a 'monster' by parenting forum
A fellow Freeper was fully invested in branding this woman as some kind of criminal for letting her kid eat peanut butter in public (having the kid eating in a supermarket is somewhat different, and I didn't address that) and I felt that the parent whose child had an allergy had a responsiblity to their own child to teach the child survival and coping skills, rather than demanding the entire public change their behavior to accommodate a kid.
We see far too much of this, and almost all of it originates from the Left, of forcing behavior of 99% of society to accomodate 1% who have an issue of some kind.