If you can prove they are in LA area and can get info such as name and address or phone, I would suggest contacting LAPD and report a fraud in progress (unless they shut it down in which case it would no longer be in progress).
That would be the way to go, criminal charges first, then civil.
I think that will be tough. We need racknation.cr to cough the details of those fckers, that way we will know who we are against here.