YES they are fraudulent because they are called dollars.
we have many currencies in the us, mostly things like college currencies designed to give parents a way to give their kids money that they cant spend in bars or on drugs, but we have many currencies, NONE call themselves dollars, they are bucks, or something else, but not dollars.
It can confuse, dont think the only dollar is the dollar bill we have the Eisenhower dollar, the Sacagawea dollar, you cant call your new coin a dollar.
from another linkThe coins were marked with the dollar sign, the words “dollar,” “USA,” “Liberty,” “Trust in God” (instead of “In God We Trust”) and other features associated with legitimate U.S. coins.
you also cant mint coins no matter what they are called, but I find this law a bit weaker as they dont seem to enforce it against various arcades and parks which issue tokens to play with