Be serious, water and cars have obvious benefits and when people use water and/or cars they aren't doing something the guarantees a shorter life expectancy. Trans fats are no different then poisons, and should be treated as such.
It's all about the dose. A small amount of trans fat provides a source of energy and calories. A large amount taken over a long period of time clogs your arteries. Trans fat is also a by-product of our lifestyle, as the only process that can prevent natural oils from spoiling at room temperature produces trans fats. I imagine food prices are going to spike in New York without acces to partially hydrogenated oils.
In small amounts, water provides hydration and makes life possible. In large amounts, you drown.
In small amounts, flu virii...a disease and far more dangerous than trans fats...make up a flu vaccine that protects you for an entire season. In only slightly larger doses, the flu can easily kill you, or at least make you very sick for a few days.
You know what else is a poison...literally? Oxygen. Oxidation of our cells is what causes aging and will slowly, but surely, kill us. Exposure to oxygen kills, instantly, any creature that does not consume it.
Then there's the retarded mercury ban. Mercury is quite helpful in thermometers, thermostats, barometers, and as a component in a preservative for flu vaccines. If you vaporize it, which isn't that easy, it can be quite harmful. It's almost impossible to find now.
DDT, in small doses, does no more harm than water to humans and protects against mosquitos for months. In gargantuan doses, it thins bird eggs and causes drops in the populations of certain birds, but still doesn't harm humans. Because of that, it was banned outright...stupid.
I feel people should be able to eat where they please...people should not have to say "oh, we can not eat here, you may have an asthma attack". Smokers meanwhile, can still eat in non-smoking restaurants. Even if they have no control over the addiction, they can still step outside and light up.
The rub is that the eaters do not own the establishment, and if the owner would rather cater to smokers than asthmatics, that's his business. There is no guaranteed right to be allowed to make purchases at any particular establishment. If you have a condition that prevents you from eating at certain places, that's your problem.
For example, I live near a Five Guys burger place. I love that place. They give out free peanuts, real beef patties, and their fries, which they practically serve by the pound, are cooked in real peanut oil. Now, some people are violently allergic to peanuts and could have a reaction just by walking in there. Do they now have to stop using peanuts?