Your entire post is dependent upon ignoring one sentence I wrote. I suspect you did so intentionally. Here it is again in case you actually missed it:
Farmer Br0wn:
If the illegal immigrant has used identity theft or some form of document fraud, it can be very hard for small businesses to be able to detect such a thing. It can even be difficult for a large business to do so.
People who sell falsified documentation and/or stolen identities tend to sell these documents to several people. It's an entire cottage industry.
I don't know the specific details of this companies internal dynamics, so I can't comment on who knew what. I was speaking to the notion that some want to hold a company responsible for our government abdicating it's basic duties.