like me? *shot*It actually depends on how old you are. If you're very young (say, early teens or younger) it can alter your neural development. That's not to say that it's the same for everyone. Some peoples' brains develop faster than others, but I'd still say stay away from it until you're at least fifteen. And even then, don't go out and get wasted every Saturday night.
ok ok, joking aside.
anyway, yes, it does depend on how old you are. i would stay away from alcohol until you're in your older teens. a sip is fine, but i even went a little overboard and usually every new year's eve i get drunk and pass out from all the champagne drinking :P and i'm like... what... fourteen? LOL. /bad influence.