Facebook is the party line of the 21 century.It has destroyed friendships ,marriages, broke up church groups with gossips I don't have an account nor do I want one
Truth is once you say it or put it on line the world owns it. You can't unring a bell.
Anything you put online, whether it is on a social media site or a blog page, is public information and no longer private. Everything you post online from every picture you post to every comment or "like" you make or groups you join is fair game for employers, police, and attorneys for seven years. Companies want to make money and maintain a certain reputation in the community. They don't want to hire anyone that could potentially damage that reputation.
I think asking for usernames and passwords is going a bit far, but given all the social media scandals that have happened over the past few years I don't blame them. If you don't want to play by their games, get ready to not have a job.
The solution to the problem is simple. Either you screen everything you post online and keep your private life private, or get off of social media sites. If you want to engage in questionable behavior make sure you watch your paper trail.
I joined Facebook not long after it was opened up to Texas for .edu accounts and I have deleted my account and have been completely off social media for 9 months. I have a lot more time on my hands to be productive. My personal life is private and no one needs to know anything about it. I have absolutely nothing to hide, but it is no ones business but mine.