Josh Hartnett received an “unhealthy” amount of fan attention during his younger years. The 46-year-old actor achieved heartthrob status as a teenager, but Josh now admits that he found it to be an overwhelming experience. He told the Observer newspaper: “People’s attention to me at the time was borderline unhealthy.” Asked to clarify what he meant, Josh replied: “Well, look, I don’t want to give this a lot of weight … There were incidents. People showed up at my house. People that were stalking me.” Josh recalled one incident when “a guy showed up at one of my premieres with a gun, claiming…