"Walker said he used his actual street address in England but entered Arkansas as his state with the Schenectady, NY, ZIP code of 12345."
In fairness, that's fraud on Walker's part not on the Obama campaign's part. There's a limit to what kind of checks you can feasibly do. By the sounds of it, requiring a billing address in the United States seems reasonable.
> There's a limit to what kind of checks you can feasibly do.
Actually, this one would've been easy to catch - we know which states have which zip codes. The company I work for checks this in web forms, but I don't find that such validation is common.
> By the sounds of it, requiring a billing address in the United States seems reasonable.
Problem is, it isn't. US citizens living abroad have every right to donate.
But I admit I hadn't thought about citizens living abroad; that makes it more understandable there would be these issues. It's certainly a case of (perhaps) incompetence over malice anyway.
Edit: my mistake, I missed that he claimed the zip was in Arkansas.