I think it is naive this is any kind of proof of anything. The fraud can happen in many ways. It might be a person leaning one way or another thinking they are

I think it is naive this is any kind of proof of anything. The fraud can happen in many ways. It might be a person leaning one way or another thinking they are working for a good cause. Actually, I think making it difficult for people from opposing party to vote is a kind of fraud, made in broad daylight. Proving absence of fraud is much more difficult than showing there aren't obvious signs of it. BUT, and here is important thing, this is really a question of burden of proof, and in this case it is on the accuser. In absence of proof it is assumed voting was legitimate. Also, extraordinary claims require extraordinary proofs.