Will Peer Pressure Stop Vote Challenges?

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I had a weird idea last night and thought i'd seek some feedback here on it.

We all know that Republicans in general are scared of African Americans. So if you see a Republican challenging voter eligibility in lines or in polling places, why not just approach them and say VERY LOUDLY "Hey! Your not trying to disenfranchise African American voters are you? Hey! Does anyone here in line want to see this screw disenfranchise African American voters? Everyone who doesn't want to see African Americans get Jim Crowe'd by this white boy come on over and tell him how you feel."

I don't think there are many Republicans that will stand up to this kind of pressure. Thoughts?