The propogated acceleration outputs between electromagnetic forces of the superliminal scissors atoms would degrade before the point of intersection( The energy needed to accelerate anything to light speed is infinite, but the amount of energy needed to break a particular thing is finite.)This entire thought expirement is contingent on infinite energy being available, however, and the amount of paradoxes that woud arise must be considered. Time dilation and the asynchronization between the inertial frames would affect the time flow frame as well.