Caffeine and public health

It may not be a huge one nor a very well studied one, but it looks like there is a public health issue here somewhere: 

"The number of American emergency hospital visits involving energy drinks doubled between 2007 and 2011 to more than 20,000." 

I'm not saying that I support a particular ban or regulation, but I do think there may be a problem here requiring more regulation at some point down the road.