LONDON - MAY 15: A disabled man smokes a joint during the cannabis march in London during the annual global cannabis campaign with marches in over 150 cities worldwide May 15, 2005, London, England. Grandma Putt was recently convicted of possessing cannabis after getting caught eating it for medicinal purposes to relieve the Multiple Sclerosis she suffers from. Campaigners have stated the march taking place soon after the general election is the largest 'united front' against the prohibition of cannabis ever assembled in Britain. (Photo by Chris Jackson/Getty Images)