Moviegoers harbor a great deal of affection for Daniel Radcliffe, having watched him grow up as Harry Potter, but he's testing the limits of human charity with a movie like "Horns." Directed by the well-regarded Alexandre Aja, the French filmmaker who gave fanboys a thrill back in 2006 with his remake of Wes Craven's "The Hills Have Eyes" (he also directed the guilty pleasure "Piranha 3-D"), "Horns" shoplifts from several genres -- murder mysteries, satanic-possession thrillers, coming-of-age indie whiners -- without stealing the best of any of them.