Re: So to gain entry into America you MUST......
The problem is that the Homeland people at the border won't know what a Host's file or a firewall is.
They will just think that you arwe deliberately hiding you FB profile from them.
I'm in the same boat as you on this.
However, I have a webpage on my home server that lists a load of the places where I have stated the truth in that I have not and never will be a presence on social media. As some of these go back more than six years I would hope that they might see a pattern. But I doubt it.
I won't be travelling to the USA to test this out while Drumpf is in power.
It is easier to go to Russia these days than it is to the USSA.