In case of emergency, whether the kid is lost or has gone non responsive to calls or texts, it can be important to parents who want to be able to know where to find them in those situations. Furthermore, there are some parents who are simply strict and want to track their every movement; which could be very intrusive, make the kid paranoid, and even ruin the parent-child relationship. That’s my take on it.
Then I defy you, stars<span>! In Act V scene I </span>Romeo<span> has just found out that Juliet is dead. He is beside himself with grief and he curses "I defy you, stars," which means he denies fate. He denies fate's hold on him and he then plans to kill himself.</span>