Possibly so, to a certain extent, but in the end it's our personal responsibility to stay as much away as possible from the above things.
But I don't think laws, while necessary, can really solve the problem. If well thought out, they can limit the damange that is done, but not solve the problem.
In smoking it has had a huge impact.
You educate people and tell them it is addictive, you can make it illegal and hard for people to get, you can put people in jail for getting hooked on it. It is still addictive.
Nothing short of making heroin not heroin makes it less addictive, but then it is no longer heroin and heroin itself is still just as addictive.