A Louisiana TV news anchor has resigned after allegedly sexting and arranging to meet with “predator hunters” posing as a 15-year-old girl, RadarOnline.com has learned. KTBS anchor and news director Bill Lunn stepped down on Monday following a vigilante sting operation carried out by three local men on May 29 that has sparked an investigation by the Shreveport Police Department. Antonio Coleman, his cousin Kameron Kennon, and their longtime friend Kataurio Grigsby have spent the past three weeks pretending to be underage girls to “catch child predators” on the Meet Me app and have already caug…