The difficult point that I see is, where is the line? How much is too much? Imagine if there were no rules regarding clothing/pins/signs in polling places and it was 2008 again? Imagine how far the Obama supporters would carry the lack of rules.
I prefer individual choice and rights. Personally, I would not be offended or feel threatened by another voter in line with an Obama tee shirt on a campaign pin.
K. The provisions of subsections A and D shall not be construed to prohibit a person who approaches or enters the polling place for the purpose of voting from wearing a shirt, hat, or other apparel on which a candidate's name or a political slogan appears or from having a sticker or button attached to his apparel on which a candidate's name or a political slogan appears. This exemption shall not apply to candidates, representatives of candidates, or any other person who approaches or enters the polling place for any purpose other than voting.