If this story is correct, I'm surprised that it didn't happen earlier. If it hasn't happened yet, I'm sure it will.
The mistake these guys made was using the word "dollar". Have you ever seen a video of the way they suggest using the Liberty Dollars? They walk up to people and say something like "hey, would you be willing to accept this silver Liberty Dollar for that?" The problem is, that with the word "dollar" in there, it's too close to a "Peace Dollar" or a "Morgan Dollar" or other types of official US currency -- so it amounts to conterfeiting. If they had made it the "Liberty one ounce silver coin", I think things would be different.
I'm all for third-party money, but it really has to be done the right way.