Well, technically, they can't be prosecuted as United States citizens. So even if they have broken the law by entering the country illegally, the only punishment for that is deportation. Since they aren't citizens, they can't really have any permanent criminal record either. (in the US) And its just speculation as to the…
Hm, that would be cool- People can either make high-class citizens, or low class citizens, of one single universe. The universe would be given to us- but the character would be up to us; providing that it fits. Then we'd decide which side had a better populous. Civil war!