Ooh. That oughtta stop things.
"OK, we'll force the local school districts to educate them. We'll force our hospitals to take care of them for free. (All while our citizens are coerced into buying health insurance.) If we're lucky, we'll pass a DREAM Act which will give them discounts on college tuition so they can pay less than American citizens who attend college in another state. But please, please, please don't do it anymore!"
That, ladies and gents, is called a mixed signal.