Finally I came to this conclusion.
It is irrelevant.
Let's put this in perspective.
I heard the other day that the fastest growing Christian church per capita is in Iraq. Iraq, where choosing to follow Christ can and likely will mean censure, isolation, prison, torture, or death, often at the hands of your own family. There, knowing Christ has a real cost. Do you think that, even for a moment, that a believer in Iraq would care at all about a sign with a message such as this in his town square? Here today, gone tomorrow. In the midst of a spiritual battle with a firefight raging all around you, do you stop to read billboards?
But in America we apparently have so little to actually do for Christ that we can afford to focus a great deal of attention on this. I have heard it said that Christianity in America is a pool that is thousands of miles wide and a half an inch deep. In Iraq they are in the deep end. Committed is a word that just falls short.
So if a group of secular humanists with an agenda and a advertising budget wants to expose to the world the symptoms of their unyielding hearts and unbent knees towards God, then so be it. "If you toss a rock into a pack of dogs, the one that yelps got hit". The emperor is displaying a robe of reason, clear thinking, and modern scientific fact. And he is naked except for the chains he wears.
But this season is about the Bringer of Light and the Breaker of Chains. Chains that hold the world in bondage to sin and despair. Chains in Time Square, chains in Iraq. Chains in the hearts of those who bought and paid for a billboard that decries the Light of the World as a myth...chains that lay broken at the foot of a manger long ago, chains shattered by the small cries of a baby born to a virgin.