You do realize that visa policies are typically reciprocal, yes? So Americans will now be required to show their social media details to get visas.

Also, it seems to me that one of the best things about America is, or was, that people from all over the world went there or wanted to go there.

This kind of condescending smugness helps nobody. You'll start caring when you lose your convention industry, and American corporations find it difficult to bring the best international staff to the US (which has already begun).