[DannyTN]

If the ball park wants to do this for a handful of allergic kids, it is their right.

In this case, it's the Pro-Peanut FACISTS who want to deny the ball park the right to have a peanut free day.

[olde north church]

From what I understand, the peanut allergy is growing so quickly is related to the use of peanuts as a filler ingredient in many foods. The protein related to the allergy is a "large" and difficult for children to digest. The human body's defense mechanism acts on it as if it were an illness and the allergy cascade is initiated.
As someone who has had an extreme allergic reaction, it's no day at the beach. It's like anything else in life, when no one in your circle of family and friends isn't affected, it's not a big deal, if the opposite it's true, can be a very distressing situation.