Electioneering law: stay 100 feet away, but yell all you want

Ann Scott sent in this question after voting in her St. Paul precinct, which is located in a church: 

A woman was standing on the far corner from the church holding a sign that said something like, "IRV -- Ask About It". When I got out of my car to go in to vote, she yelled at me asking if I wanted information about it. I politely said no and went in to vote. Another woman came in shortly after I did and complained to the election officials. The officials claimed that the woman was not doing anything wrong.

Is this true? Is it permissible for someone to advertise about an issue that is being voted on that day?

Scott wasn't the only one to wonder about it. Ramsey County elections manager Joe Mansky said it's legal, as long as the person doing the electioneering doesn't come too close to the building where the voting is taking place. He even sent one of his election workers to the precinct to check it out.

"You can yell and carry on as long as you’re 100 feet away from our building," Mansky said.

Said Pat Turgeon of the Minnesota Secretary of State's office about the electioneer's behavior: "It may not be very Minnesotan, but it falls under freedom of speech."