Homeland Security's just doing the best they can to devise a system reasonably effective in keeping the undeserving hordes from taking undue advantage of the American People's generosity and love of freedom. This is DHS's holy mission, their "people's mandate", if you will, received straight from the Commander in Chief after his Tranfiguration at the Place of Ground Zero (twin|cracked|burning tablets|towers|bush).
I'm sure they'll soon find a way to track the evacuees at their new places of work and make sure they return safely to their designated domiciles, and behave properly too or else.
Just think, and wonder at the hidden farsightedness of our leaders, and give thanks: for lo, if once we learn how to properly take care of the NO evacuees, we will have at hand also a solution to our immigration/guest worker problem...
Just say no soft-headed, half-hearted measures -- and trust that those to whom God has entrusted His Country will not rest until the system they put in place is so self-evidently good for our country that opposition to it will be clearly, glaringly, obviously tantamount to treason.