Sports betting is a potentially hazardous vice in and of itself, but also a gateway to other addictive behavior, especially if the gamblers start young. "Think about putting an addictive product – gambling – on an very addictive device – your smartphone," Campbell said at a press event announcing the partnership at TD Garden. The Youth Sports Betting Safety Coalition launched Thursday includes the attorney general’s office, the Massachusetts Council on Gaming and Health, Civic Action Project, the Boston Red Sox.