If doors and gates are slamming too hard they can shatter the lock bolt as seen here with a job I did today. Make sure you get your door closer adjusted to close the door smoothly, and it will also prevent annoying noise.
Blocker Plates are great for fire exit doors, outward opening doors, and foyer doors. All are a prime target for forced entry. The Blocker Plate covers the latch and striker when the door is closed, making it tamper proof by undesirables.