you cant say something is such a horrible idea because one fiend overdoses on it. If you know what your doing and your will is strong enough you can use whatever drug you want =\ i know functional drug addicts of all kinds; pot heads, speed whores, heroin addicts, pill poppers, etc. they can all be functional, if your friend died cuz he/she took some bad shit and/or overdosed then thats her fault, not the drug. The most common cause of overdose or death from meth is battery acid, and its pretty easy to tell whether or not thats what it is =\ your friend probably didnt know what they were doing