Allergies and Responsibility
Penicillin could theoretically kill me as could a tetanus shot. Those are two drugs I cannot receive.
I cannot wear clothes washed in Cheer detergent (though I have no idea why I break out in a rash when I do.)
That's pretty much it as far as my allergies go, except that I am one of the people who can safely handle poison ivy and not react to it (as I learned when I was a teenager - - and a couple of exposures since - - but I don't press my luck.)
If I carry something that warns people not to give me Penicillin and cannot respond myself and they do anyway, it's their fault, but if I don't carry a warning and I am given some and have a bad reaction, it's my own fault.
I certainly don't have the right to tell people not to use Cheer laundry detergent simply because I am miserable in clothes washed in it (unless it's been rinsed out multiple times.)
If you are allergic to a food, you simply don't ingest it. End of story.
You don't sue the airline because they served peanuts and you don't demand that they not serve peanuts on your flight. If it is impossible to function under their normal services then you don't fly with them.
This woman's demands were unreasonable as is her lawsuit. You adjust to the allergy but you cannot demand society change unless
1) you are willing to pay for the special consideration.
2) you absolutely need the service and cannot function with the allergen nearby.
Actually the American Airlines policy of advising flyers to be responsible for their own health is not a bad idea.
The attorney that is representing Tehmina Haque (the mother in question) has a history of frivolous lawsuits. Perhaps this lawyer and others is where the real problem lies.
Furthermore, no harm came to her son.