The Fangoria Convention isn't due to start until Friday, but the gore and the madness have already begun - and this ain't Karo syrup. Eric Caidin, owner of Hollywood Book and Poster, co-presenter of The Grindhouse Film Festival, and a longtime supporter of the horror/comic/film fan communities, was attacked in his store on Hollywood Boulevard last Friday. The alleged attacker was Michael Copner, former publisher of Cult Movies Magazine, who stabbed Caidin repeatedly in the......