The Indiana Association of Beverage Retailers is seeking a statewide ban on alcoholic energy drinks. The reason they cite is that caffeine masks some of the effects of alcohol, and young people are over-consuming as a result.
This particular effort to protect idiots from their own stupidity is a exercise in futility. Anyone with ID can still buy a case of beer, and anyone at all can still buy caffeinated products. You can take them home and mix them into a glass. If you don't have any clean glasses, you can drink one after the other and have both chemicals in your bloodstream at the same time.