Fringe elements are hoping to spark major disruptions at the Republican National Convention with a series of sneaky tricks - including fooling bomb-sniffing dogs on trains bound for Penn Station, the Daily News has learned. Internet-using anarchists are telling would-be troublemakers to decoy specially trained Labrador retrievers with gunpowder or ammonium nitrate-laced tablets in a bid to halt trains or even spur the evacuation of Madison Square Garden. Top cops are girding against the attempt to foil strong anti-terrorist strategies aimed at protecting conventiongoers - including President Bush - as well as peaceful protesters during the Aug. 30 to Sept....
