By Brendan Pierson (Reuters) – Survivors of a mass shooting in July that killed six people and injured dozens in a Chicago suburb sued gunmaker Smith & Wesson Brands Inc on Wednesday, accusing it of deliberately marketing its weapons to violence-prone young men through social media and advertisements reminiscent of video games. In a series of lawsuits filed in Lake County, Illinois Circuit Court, the survivors, including relatives of those killed, said the Springfield, Massachusetts-based company “knowingly sought to place its weapons in the hands of disturbed young men by targeting and exploi…