They use it plenty. If you go to the USDOJ websites to actually track such stats, you'll find that they use it just as much with street gangs as they do with LCN, it just doesn't make the same headlines.

Suburban America (where you're not likely to meet a Crip, a Blood OR a Mafioso), loves a good gangster story. The street gang stuff just doesn't market as well, so you don't read about it.

So the whole argument of "why don't they go after the Black dealers?" really is a crock of shit. Just because you don't read about it doesn't mean it isn't happening.

As an aside, most States now have their own RICO type statute.