you said it all in the first sentence.It istheir money and their lives to do with as they wish. That is pretty much the definition of freedom and liberty. its every Americans right to be as selfish as they want with their money be it spend it on drugs to get high, gamble it away in Vegas, or even light cigars with 100 dollar bills in front of a homeless family in new Orleans if they wish. Or would you be in favor of bush signing a law that says every American must give 10 percent to their church and another 10 percent of their money to the united way because it would be selfish not to?
If you give the federal government the power to stop someone from doing drugs because its selfish you give that same government the power to stop any american from doing anything a federal bureaucrat thinks is selfish
Yet they still have to live by our laws.
Or they can exercise their freedom by moving to an unclaimed island where it is reasonable for them to substance abuse without dragging the whole of our society down with them.