Do you think campaign buttons and t-shirts should be allowed in polling places?

A new missive spreading rapidly on the Internet grapevine advises prospective voters to avoid wearing campaign buttons, hats, t-shirts, and other political garb to polling places on November 4 so as not to be turned away for "passive electioneering." You're probably tempted to scoff, but here's the kicker: it's true in some parts of the country...