First of all, even if you aren’t a drug user, the overwhelming odds are that you know someone who is. This person may be your brother, your neighbor, or your priest. They may be your mother, your father, or the police officer who last pulled you over.
I find that the majority of protests that I hear when bringing up the subject of prohibition fall into one of two categories: they are either based on the shock value of “oh my God, you want Heroin to be legal?!” or they are based on pseudo-scientific bachelor’s degree level information. Either way, they never hold up to scrutiny of even the mildest sort.