Energy Drinks Bad?

[clashrocker7]

I've gotten this from people because I drink them all the time. Some people say they're bad, some people are bold enough to tell me they'll kill me.

I think this is completly false.

I'm fourteen, and have been drinking 1 every morning for a year now. My health hasn't decreased at all. And I'm feeling no different than I did a year ago.

So what is so bad about these drinks?