have a valid address and one can vote. I'm assuming that the former residents of the foreclosed homes have found new residence, so there's no problem there. I guess the only problem that could occur is if someone moves in (legally) to a formerly foreclosed house is if the computer system takes too long in updating the address as no longer in foreclosure.
I don't see a big deal here, and since ACORN was the organization of choice for the Messenger to quote, I have to wonder if this isn't some grand overreaction.