Sure, you can provide a fake profile. And then they'll find out your real one (Facebook will certainly be compelled to help out) and you're now guilty of lying to the border officials, and probably banned for a long time, if not for life.
I wouldn't phrase it like that but, yes, there are ~200 countries in the world.
Things like this (and this[1]) just help destroy the idea that the US is a special haven of freedom that cause many people to want to visit in the first place.
At least in my opinion USA is one of the last countries on earth which is offering near 100% freedom of speech, largely free trade and individual freedom, right to own guns and many other things which you can not own without nonsensical bureaucracy, huge landmass, top notch education and a growing capitalistic society.
The way I see it countries like France, UK are pretty much going down the drain through which welfare states often go. In these countries government perhaps don't even need your password. They can do all sort of unauthorized searches any ways. Australian society remains hostile to non white people and China lacks individual and political freedom. Canada is close but it is far too cold for me. Japan is pretty much isolated because of the language and unique culture.
> Do we really need the USA anyway? What is honestly being lost if we're banned?
Good, don't come then. I've traveled the world a decent bit, and there is a reason why people from all over the world come to the US to start a business or try to make financial independence and a better life from their home country.
In many cases its because of ignorance -- America's cultural dominance simply makes it the default rich nation to try to enter. Many are shocked (in one case I vividly remember, to tears) to hear how much better life is for many in mainstream developed nations than it is in the US.
How would they discover you provided a fake profile in the first place? Sure they might be able to catch a percentage of people, but not nearly all of them.
A: Most people aren't gonna bother, or do this right. B: Most people will leave their original profile up, so quickly searching might find that person's photo with another account. C: There will probably be a lack of activity. "You signed up for Facebook 1 month ago?" "Why do you have no friends talking about this trip?" etc.
People that don't want to get caught entering under false pretenses can just delete social media or not post dumb stuff on it in the first place. This isn't gonna catch spies[1] and terrorists or whatever, it'll prevent visa overstays and stuff like that.
[1] Though I heard of one spy getting caught cause she tried to collect frequent flier miles on her main account while traveling under aliases. So, who knows what kinda things will happen every now and then. But that can't be the primary aim of the idea.
Depends on whether they decide they want a reason to get you out of the country later. How much do you speak against the regime? They won't be interested in most people but they will target their efforts.