Complete BS. The legal doctrine in this country is that there is no expectation of privacy in a public place. Not much more public than the net.
You’d think not but.....
http://abcnews.go.com/US/secret-us-policy-blocks-agents-social-media-visa/story?id=35749325
“Fearing a civil liberties backlash and “bad public relations” for the Obama administration, Homeland Security Secretary Jeh Johnson refused in early 2014 to end the secret U.S. policy that prohibited immigration officials from reviewing the social media messages of all foreign citizens applying for U.S. visas, according to a former senior department official. “