No, because accidents happen. If you are still trying to debate the drug legalization argument, I do not why - we will not agree if we battle for days.
People who take drugs are not taking them on accident. So, the problems that do arise when drugs are taken, arise out of self destructive type behavior that often spills to others.
When people drink or do drugs the tendency is to become even more self-absorbed than we already are. We tend to loose our apathy and increase our inability to relate to another human being. The very reason so many folks using heroin or some other drug drops a close friend off at a hospital or somewhere else to get treated when something goes wrong with them. They aren't sticking around to make sure their friend is okay - they drop and run. And this is the one who is lucky.
Sometimes they don't want to ruin their good time so they wait to call for help or wait to take this individual for help until it is to late. It is sad but it is true.