I'm not a huge fast food eater myself, but this "information" is incomplete.
The amount of chicken nuggets you would have to eat in order for your body to get poisoned by the additives you mentioned is a lot. A rough estimate from me is that you'd probably need to eat somewhere in the ball park of 4-5 pounds of nuggets in a DAY for this to become a concern.(It could be more, I'm not a math major, I'm a med student XD) If I eat one 10 piece nugget and some fries, I'm full.
Also, most frozen foods, canned and boxed foods you get from a grocery store will have similar "dangerous" substances in them. The only time these substances become dangerous is if you ingest too much of them and too much meaning an unusually high amount.
Caffeine is even bad for you in large amounts, but people haven't stopped drinking, energy drinks, sports drinks, sodas, teas, coffees, ect. And if you must know why caffeine is bad it is a diuretic. Diurectic's make your body want to urinate, so if you keep ingesting caffeine, it could be VERY bad for you because your body won't have time to fully rid itself of its toxins. Our body naturally makes an antidurectic, but if we keep ingesting a durectic, our body won't be able to keep up with the antidurectic need.
I tell you this because even in all natural foods, you're going to find toxins. That diuretic I mentioned, yeah that's NATURALLY found in melons, asparagus, parsley and celery. (There's more, but those are off the top of my head).
So kids, enjoy your nuggets, just try not to eat them by the pound.
