People tap-tap-tapping at their fucking phones gets the same reaction from me. Of course it's irrational for me to feel this way, so I've learned to ignore it.
That same propylene glycol is used in cakes/cupcakes, frostings, many ice creams, beers (as a foaming agent), some coffees, candy, many salad dressings, flavoured coffees, dried fruits, some brands of milk, many beauty products (makeup, shampoo, soaps)...
There are a lot more people with peanut allergies and we don't ban people from eating products containing peanuts anywhere in public. Why is this case different?