Roadside pulpits

I love reading roadside pulpits - those signs outside of the buildings of religious communities, and auto repair shops. I am just amazed at how poignant, and true, some of these short bits of wisdom can be and really keep me thinking. I am also amazed at how weird some of these are and how irritated I can get about them .

There is a fundamentalist church in our town that has me really puzzled. Their minister is the official minister to KU Sports, which I find bothersome, and he has been very outspoken in the community against GLBT non-discrimination clauses. I am not a fan.
His church recently had the following on their roadside pulpit:
Sin Closes God's Ear.

What the heck is that about I thought to myself. That doesn't invite me to come there. That doesn't offer me hope. That makes me feel really awful for anyone who believes that. I thought that maybe the other side of the pulpit would then read: But Opens God's Heart

Nope. Nuthin.

I thought maybe this was a passage of scripture and since I am not really up on the bible I was missing out on the connection. Googling this phrase got me nowhere.

I find it hard to believe that making this statement is attractive to anyone, let alone that this is a message that is possibly reiterated inside their walls on Sunday morning. Sin closes god's ear? So we all "sin" and there is no repenting? No apologizing? No forgiveness? No LISTENING? I can't get behind a god that won't listen to me because I make poor choices and honest mistakes. I screw up... I'm still learning. Sometimes I am making it up as we go along. Aren't we all?
God won't listen to me because I'm human? What about good intent? My first ever fortune from a fortune cookie said "The road to hell is paved with good intentions."

If you know me, you can imagine the amount of incredulity in my voice. I am totally baffled by this attitude. I don't consider myself a theist anyway, but good grief - from a marketing standpoint that is not good advertising. How can god be a forgiving god if she/he/it can't hear us because we're so awful?

You can tell I am pretty upset by this since I am writing all these choppy sentences. What on Earth are they thinking over there? Anyone? Buehler?

Is there some theology that can help me understand what this means in a positive way?