Atheists

Reading Time Magazine’s page a couple of days ago, I landed a piece in the Religion section about Atheists Billboards in major cities in America. Very Splashy, very creative…. but I wonder how effective these billboards are? Who is the target audience? I am interested to hear your thoughts and your opinions on this advert?
Does it offend you? Does it make you laugh?
Can this sort of advertising make a difference?
Are you sympathetic to to the message?
How might you respond to this message if you could speak with its creator?