Sorry, should have been clear. Lethal allergen tour = bad. Banning completely = also bad.

My main point was that there is a line between discomfort and danger. That line can move based on the situation, so it is awkward to abstract without getting down to specifics.

If say 5% of the population suddenly developed a tendency to go into anaphylactic shock on exposure to vanilla, then you could easily see it disappearing from fragrances altogether and becoming a non-problem in that regard. Yet it would still have culinary use and join many friends on the bolded ingredient lists on food.

There is a turnover point (that I cannot explicitly define) where the onus is on the afflicted to ensure their own safety, rather than the population at large going out of their way to ensure it.

I am fortunate to have no issues like this. In 5% Vanilla-Death-Land, the smell of the stuff would still give me pause, as I probably know someone who could well die from the idiot that just walked in the door honking of it.

If the same person instead just brought in a vanilla milkshake, I probably wouldn’t bat an eye.