To the point of giving social media handles to the US for ESTA reasons: I mean, technically, that question is optional. Also, that question is one of the reasons I have a LinkedIn account, with a photo made by my employer, with my legal name, work position, work address, coworker network and very Safe For Work posts I don't mind anyone seeing.
If any government wishes to cross check that I'm a real person with a real job at a real institution in my country of origin, my LinkedIn is right there - there's no need for neither my boss nor any official to be aware of the existence of my tumblr.
According to the US embassy in the UK, it depends on the visa type:
But also they've been straight up ignoring the valid documentation that people have been showing and either denying entry or actively incarcerating people for it, so honestly, it's all a moot point. If they don't like you and want to demand you do it, they WILL kick you out if you refuse
Meanwhile the FCDO has updated its advisories on the US and started issuing cautions about travelling there. So, there's also that. Wild times













