The only other way you can get around it, is to open an account but use an address from another state, such as a Louisiana address. It will work. I really don't see how you would get caught doing that. Do you have any friends in a wagering state that would allow you to use their address? If so, go that route. Other than that, I don't know what else you could do.
I wonder if they can tell where you are by your ISP. I know some sites can tell where people are when they sign up.