Members of other ethnic groups do get violated for associating with felons. However, the ones who do get violated are usually high-profile or important members of powerful organized crime entities. The government isn't monitoring everyone obviously, but they will have agents following the head of a major Cosa Nostra family. Not only that, but they are also surveilling his underlings. They do the same with the Mexicans and the Hells Angels for example. You just don't hear about it a lot because it isn't reported on as much.

But you had to play it cool, had to do it your way
Had to be a fool, had to throw it all away