US now proposing that all visitors have to disclose their last 5 years of social media content along with phone contacts, email addresses etc, regardless of whether they need a visa or not as well as biometrics and a selfie for an ESTA application.
US plans to start checking all tourists' social media | US News | Sky News
I imagine Palantir or other mates of the orange gibbon like Elon will be allowed access to this info as well.