I think this article in the NYT has lessons for towns like Shelton that are creating a hostile environment for undocumented immigrants.

RIVERSIDE, N.J., Sept. 25 — A little more than a year ago, the Township Committee in this faded factory town became the first municipality in New Jersey to enact legislation penalizing anyone who employed or rented to an illegal immigrant.

[snip]

Within months, hundreds, if not thousands, of recent immigrants from Brazil and other Latin American countries had fled. The noise, crowding and traffic that had accompanied their arrival over the past decade abated.

The law had worked. Perhaps, some said, too well.

With the departure of so many people, the local economy suffered. Hair salons, restaurants and corner shops that catered to the immigrants saw business plummet; several closed. Once-boarded-up storefronts downtown were boarded up again.

[snip]

“I don’t think people knew there would be such an economic burden,” said Mayor George Conard, who voted for the original ordinance. “A lot of people did not look three years out.”