It figures that one sure-fire way to eliminate the majority of the voting fraud we have is not, according to you, legally possible. At least, that's the way I read your post.
No, that's what I am saying, that's what you are implying. Intelligent men and creative minds are not limited to your conclusion that there is one, and only one, method to achieve the end you think necessary. If that is the only way, then you may be correct. But the desired result surely can be done by a less intrusive method.