I think op is asking why we can't just wave our hands here, legally. Obviously they don't have a valid visa, but these are extenuating circumstances. Just take

I think op is asking why we can't just wave our hands here, legally. Obviously they don't have a valid visa, but these are extenuating circumstances. Just take them to an airport and send them home. If they're chaperoned the whole time, who really cares if they have a valid visa while traveling to the airport?