BILLERICA, MASS - SEPTEMBER 2 - Billy Pfaff, a formerly homeless 46-year-old, started a Facebook group called 'Heroin Is Killing My Town' after his best friend overdosed last year. More than 30,000 people subscribe. With no training, the man best known as 'Billy Inkslinger' has become a sought-after counsellor - a testament both to the force of his personality and the holes in the formal system. Carlos Osorio/Toronto Star        (Carlos Osorio/Toronto Star via Getty Images)