Another thought that I had today regarding 'warning labels'.
IMO - requiring warning labels on soda pop will give 'watchdog' groups such as this a 'foot in the door' for requiring warning labels on just about any product that is sold, as there is a certain amount of inherent risk in ANYTHING we do or eat.
Using warning labels to 'warn' people of the OBVIOUS - that if you drink too many regular sodas, you run the risk of becoming fat - actually *cheapens* the warning and people end up inverably ignoring it. Think about it - the Nutrition Facts label - on EVERY single can of soda pop in the US - ALREADY cites the calories, amount of sugar and the fact that there is caffeine - if people aren't reading THAT label then why even bother with a "warning label"? Personally, I would regard it as an insult to my intelligence!
I can see proof of this right here in my state - that if warning signs are required, they blend into the landscape and people don't 'see' them, they just go ignored - as Prop 65 requires businesses to post warning signs UNLESS they submit proof to the state demonstrating that the exposure it causes poses no significant risk. (For a chemical that is listed as a carcinogen, the "no significant risk" level is defined as the level which is calculated to result in not more than one excess case of cancer in 100,000 individuals exposed over a 70-year lifetime. In other words, if you are exposed to the chemical in question at this level every day for 70 years, theoretically it will increase your chances of getting cancer by no more than 1 case in 100,000 individuals so exposed.)
Rather than spending the $$ to have their locations, etc tested, most businesses in California simply put up the required Prop 65 signage, which to my mind renders the 'warning signs' meaningless - like the Boy who Cried Wolf, in my mind...
As for the parents putting soda pop in their infant's bottles - enough comment has been made on that - it IS horrifying, but I don't think a warning label is going to stop them from doing what they want to do (I've heard that "it's just their baby teeth" explanation as well, BTW) anymore than the parents or caregivers who add vodka to their baby's bottle to 'help them sleep' would.