A better hiding place is inside a neighbor's home out of sight. Keep tabs on who has keys to your home. Poor key control can lead to unwanted visitors and theft. If you're not sure you can account for all the keys to your doors, change the locks. All exterior doors should be solid-core, rather than hollow core.
Any lock installed in a hollow core door is much less secure.
In fact, hollow core doors are more easily lifted off their hinges and are not heavy enough to support the better locks, such as double cylinder deadbolts. A wide-angle peephole installed at eye level permits you to see who is outside the door without opening the door. It is much more preferable than a chain lock for this purpose. If a burglar can't easily get through a door, he may well try a window. Proper home security should take this fact into account.