A friend from high school committed suicide a few days ago via overdose, but was not addicted to whatever he used.
Actually, no one that I'm really friends with even takes any drugs that are a) physically addictive or b) able to be overdosed on, other than alcohol. I have a friend that has tried coke once, but he's the responsible type that wouldn't ever use a chemical enough to get addicted to it.
The stuff my friends do take are physically harmless (marijuana, LSD, ecstasy, shrooms), especially when compared to cigarettes or alcohol or stuff that SHOULD be considered a hard drug by comparison.
In that sense, I feel like society is way too biased when it comes to drugs. Most people just assume that all are physically addictive or can even be overdosed on.