Maybe these few are "anonymous, invisible" to you, Sheriff, but the rest of their ilk are highly visible to us. And nearly every one of them is breaking some law by being here illegally, using false identifications, nonpayment of taxes, working illegally, driving without a license or insurance, etc., etc., etc.
There's no mystery as to who these "other" lawbreakers are. We see them on the street and in the stores every single day.
Every single day, Sheriff!
There is a bonanza of criminals walking around right under your nose, Sheriff, and can arrest ten, twenty, a hundred of them any time you want and with little effort.
What is common law robbery?
And while I'm at it, what is the difference between theft by taking vs theft by deception vs other kinds of theft which I can't remember right now?