@godwinpulis,
I suggest you respect your son's privacy and, instead of spying on him, work on developing a good relationship based on mutual trust and respect.
Yes, it is possible for you to learn your son's Facebook password. However, unless you have explicit permission from both Facebook and him, obtaining his password and/or using it to access his account could result in legal problems and ethical issues.
For example, you could ask you son for his password but if he gives it you, he would be violating the
Facebook Terms of Service which state:
Quote:
You will not share your password (or in the case of developers, your secret key), let anyone else access your account, or do anything else that might jeopardize the security of your account.
It's possible that obtaining the password from him and using it to access his Facebook account would violate U.S. federal statutes relating to unauthorized access to computers and electronically stored information. Specifically, doing so might constitute a violation of the Stored Communications Act (SCA) and/or the Computer Fraud and Abuse Act (CFAA).
Even if you have the right as a parent to access and control the digital property and electronic communications of your 16-year-old minor child, you likely don't have the right to take illegal actions to exercise it. For example, if your son rented a safety deposit box at a bank to store his personal diary, you might have the right to access the safety deposit box and its contents but you wouldn't have the right to burglarize the bank to do so.
There are parental control and monitoring software applications you could install on a computing device you own that is used by your son to access Facebook. But using such applications could cause other problems. Such software might have security vulnerabilities that, if exploited, could seriously compromise your family's privacy. You could also install or use a hardware keylogger and other types of monitoring/recording hardware but that could also result in security, privacy and legal issues.