For doing this good deed:

The 9th U.S. Circuit Court of Appeals ruled 2-1 that prosecuting these medical marijuana users under a 1970 federal law is unconstitutional if the marijuana isn’t sold, transported across state lines or used for non-medicinal purposes.

Volokh blogger Randy Barnett argued and won this case and he provides technical details and more links here.
We need more like this:

The decision was a blow to the Justice Department, which argued that medical marijuana laws in nine states were trumped by the Controlled Substances Act, which outlawed marijuana, heroin and a host of other drugs nationwide.

No, what we really need is for the myriad local, state and federal drug laws to be eliminated.
Via Talkleft.