The trouble starts when you have fake doctors offices on every other corner like they supposedly do in California.
As long as the program is monitored correctly it shouldn't be such a big deal. If the Government is capable of doing that is another question.
“Medical marijuana was supposed to be for the truly ill cancer victims and AIDS patients who could use the drug to relieve pain or restore their appetites. Yet the number of dispensaries has skyrocketed from five in 2005 to 143 by the end of 2006. In North Hollywood alone, there are more pot clinics than Starbucks.”
-- Pasadena Star-News, January 21, 2007