Are you referring to financial accounts or social media accounts? (If social media accounts, I'm guessing you're referring to the US specifically, and during advance visa processing rather than at the border.)
this is reason enough to close the vast majority of them. if you're engaged in discussion, that's one type. the doomscrolling types, more addictive but very much more disposable.
You don’t “have to”. They’re requested when travelling to the US - but from my experience it’s not enforced (at least not consistently, I’ve never been asked why it was blank on my forms)
I thought so too, and said so at a meeting at work when some colleagues were unwilling to travel to the US.
It turns out close contacts of some of my colleagues have been asked to show their Facebook accounts at the US border. There was a recent rule change about it.