Six Flags Great America in Gurnee, Ill., has confirmed that their security guards will no longer wear repurposed military ribbons on their uniforms after a former Marine corporal issued complaints about the policy. Robert Smith, an infantryman who served in the Corps during the first Gulf War, said he recently showed his son the awards he earned during his time as a Marine. But when they walked through the ticket gates at the Six Flags amusement park on Saturday, his son pointed to the security guards and told Smith they were wearing ribbons just like his. “I saw a 23-…