What does mtv know? I won't say that using aas has never caused a death, but then like any type of medication/supplement there are those that should be taking them and those that shouldn't.
Just like a an engine in a car, it can naturally produce a certain amount of hp, slap a turbo/supercharger/nitrous on it and it will produce more. Now, if the engine is in good shape and the stress put on it from the add ons does not exceed the mechanical capabilities of the engine, all is good. However, put a 100hp nitrous kit on a 1970 chevy 350 with 200,000 miles on it or on a 2001 Infinity engine and in about 2 seconds you will have a pile of metal.
Same goes for humans, you better be physically, mentally fit and know your limits or you will detonate by overdoing it or doing aas when you shouldn't!