Thats the rough part about freedom,it has costs above and beyond what most people consider.
Drugs and their use should be legal.
If there are children involved,and the environment is dangerous for them,then there are laws that already deal with that,and they can be removed , and chances are you won't hear a peep out of anyone about it because it's the right thinfg to do.
Drug laws are only effective in generating revenue,and getting people killed.
For as many lives as I've seen messed up by drug and alchohol use, I've seen just as many ruined over casual responcible use , by an over reaching justice system.
Freedom means some people are going to do things you don't like,just as you will most likely do something someone else disapproves of.