Families fled in fear, animals were locked down, and cops swarmed zoos across the U.S. after a wave of terrifying hoax calls sparked emergency evacuations from Ohio to Arizona . Authorities say the threats — including bogus bomb scares and fake active shooter reports — were all part of a growing “swatting” craze that’s draining police resources and terrifying the public. Thankfully, no bombs or gunmen were found. But the panic was very real. A SWAT team on patrol in New Orleans earlier this year (AP/Butch Dill) At the Akron Zoo in Ohio, visitors were rushed out Sunday after a threat triggered a massive police sweep. Officers later gave the all-clear, but the zoo shut its gates for the rest of the day anyway. Just hours later, drama erupted again at the Cleveland Metroparks Zoo, where frightened guests were evacuated as police surrounded the area. Furious visitors blasted the disruption online after their family outings were cut short. The Columbus Zoo and Aquarium was also hit on Saturday.…