It's a weird idea for US immigration to look at people's social media, when it's possible to have multiple profiles on most platforms and not compulsory to have social media at all.
It's not weird at all. Facebook is a government's pipe dream.
I view Mark Zuckerberg's crocodile tears as solely on account of the fact a 3rd party did it this time.
Facebook is incredibly dangerous.
After I had individually deleted my entire FB history, I was still able to download an >500Mb zip file. Digging deeply in their obscenely named "privacy settings" was an eye opener.
Everything Facebook claims to hold dear is just bold faced lies. I have reported several clearly fake profiles and other material which breaches their T&C's and they do... absolutely nothing.
Not a day goes by now when I don't feel vindicated for leaving Facebook. It is an incredibly useful tool to communicate but therein lies the dangers. Back to email, skype and phone for me.