"sorry that the kids without documentation are caught in the middle! "

Undocumented is a bit vague to me, as many seem to use that term in referencing  immigrants without legal status.  But it could just as easily mean a naturally born citizen without a passport or updated identification card.   We live in a country of laws, so if the law says we must all have some kind of documentation to travel overseas, then I'm not sure I see the problem?