Or, you know of a business that employees illegal workers in your town. The business owner through hiring cheaper labour has expanded and now owns 12 dry cleaning and commercial laundry locations in your state and buy all accounts his customers are very happy with the service. This has, however, put Americans out of work.
How would we know the immigration status of the people in those locations? We can conjecture but we could be wrong. The employer had to keep records. The government may come down and do a ssweep of an area looking for "illegal" immigrants, but then inevitably they wind up taking away legal immigrants also. I have seen it before. Also sometimes in their eagerness to "sweep the streets of these people they have also deported American citizens of ambiguous racial identity. It isn't fair.