Now they’re electrified. One day after a dim-bulb worker caused chaos at JFK Airport by failing to notice a metal detector was unplugged, the TSA cracked down on its security screeners at the international aviation hub yesterday. “The supervisors are not happy,” one screener told The Post. “They’re coming by double- and triple-checking us.” The screener also said red-faced bosses were “blaming everything” on TSA agent Alija Abdul Majed, whose alleged bungling caused the stunning lapse in security. Terminal 7 was evacuated and two planes were called back from the runway after the metal detector was found to have been...