Next, they have to show papers of legal residency or they can't: bank, attend school, and get any medical care but life-and-death.
They will all deport themselves.
You are definitely on to something. You can't speak english...you can't do business. You can't speak english...you can't go to school. No drivers license? ...you can't drive. No green card?..you can't work.
We might see a rise in crime for a while, but they'll quit coming in in droves.