"Back doors" in electronic devices allow for law enforcement agencies to verify the activities of the device's owner. However, these "back doors" also open up the possibility for non-law enforcement agencies to monitor the daily activities of that device's user.
New York and California have had bills proposed that would mandate a "back door" be available on all devices to make America safer due to recent incidents. These "back doors" would make electronic devices more susceptible to hacking efforts by third parties.
Many people keep sensitive data on their electronic devices. Requiring "back doors" forces weaknesses into the technology that can be exploited from collecting confidential work information to invading American's privacy under the guise of increasing our safety and security.