Silver Tour, speaking with seniors about medical marijuana. His most recent brush with law enforcement went down this summer. In May 2011, Platshorn received a letter from the parole board apparently releasing him from service. But this July, after his parole officer had passed away and two days before he was to speak before the American Bar Association, a new parole officer named Scott Kirsche showed up at his door and demanded he give a urine sample. Platshorn -- who says his former parole officer allowed him to travel to pot-related events and also approved his use of cannabis oil for skin cancer -- failed the test and was ordered to immediately stop treating his cancer with cannabis oil. Then, in one of the most shocking elements of Platshorn?s life story, he received what is effectively a gag order: Platshorn told South Florida?s Sun Sentenial that he is banned from travel ?to promote the legalization of marijuana without the express permission of the U.S. Parole Commission.? Platshorn was specifically told not to appear at an upcoming High Times medical event in San Francisco, and to cut ties with patient and fellow Silver Tour board member Irvin Rosenfeld. In July, U.S. District Judge Donald Middlebrooks ordered Platshorn to remain under parole supervision, while claiming his request for freedom to speak at marijuana-related events conflicts with his criminal record. 5. Will Foster US Army veteran and business-owner Will Foster was suffering from widespread rheumatoid arthritis when he started growing marijuana. In 1997,