*** yes, legit yes.
In any game that defines a time limit for victory, it is up to the game designers to ensure that the rules allow for milking the clock.
Think basketball - 24 second shot clock, think football 40 secondsd to hike the ball.
PP needs to allow for people to 'use up' all of their allotted time to take their turn. If they run the clock out on you, too bad for you.
This alleviates any "he is cheating me he said she said" arguments.