They make a good vodka mixer though ;)... kidding!!
I remember seeing a documentary a few years ago linking some energy drinks to heart conditions and resulting in deaths in some cases, I'm not a big fan of them. I haven't had an energy drink in years, I've hardly had a soda drink in years, and now apparently even 'diet' soft drinks are as harmful to our bodies. I never got into the diet soda trend myself, but there is just so much wrong with the food industry in general, it really is a huge problem for humanity.