It's easy to see how these high levels of sugar add up. A 12oz soda has between 30 and 40g of sugar, right around the recommended intake for your entire day. After a refill or two, you're looking at more than 300 calories, and up to 100g of sugar in your beverage alone. Considering how easy it is for people (especially kids and teens) to chug a few glasses of soda at one meal, consumption can get into dangerous territory pretty quickly.
Sure, it takes some personal responsibility to not consume all of your daily calories in soda, and you might say that banning free refills is anti-freedom and anti-American. But there are other kinds of freedoms at stake for France, like freedom from shouldering the public health burden of obesity -- which in America runs up a bill of $147 billion.
On top of that, when you add in the addictive qualities of sugar, can you really be certain that refilling your 64oz soda is a choice you're making freely? Perhaps France, in eliminating free refills, is giving its citizens a chance at the best kind of freedom: the freedom of health.