i think this lie detector thing had been abused in MSEA before especially in zakum (when it is going to die),where the person will use it to prevent anyone from attacking and cause them to die,and the person loots everything
but the abuse was stopped after a patch whereby all Lie Detector will REMOVED and they make it to the point that even when the Lie Detector window pop-ups,the person will still be able to attack,though i do not know the exact details