You know how every few years there'll be a story about some atheist group putting up a billboard or renting space on bus stop benches saying things like "You're right to doubt God" and "There is no Heaven or Hell; Live for today" and all the local churches are on the news talking about how offensive it is and then eventually the signs get taken down for being anti-Christian?
Well that's exactly how it feels to an atheist, or an agnostic, when they see church signs with witty little messages on them like "He died for your sins; what have you done for Him lately?" and "Well it's a good thing He believes in you" and "Jesus is the reason for the season." They're the same thing: obnoxious attempts to push a particular faith onto people who don't share it.
So I really think that the atheist billboards need to be pointed at the churches with clever signage. And I think the free birth control Planned Parenthoods need to be located across the street from all of the Catholic hospitals that refuse to offer insurance which covers birth control. I think that if the debate is going to descend into tit for tat, we need to keep our tits with our tats. Why offend innocent bus stop bench sitters when you can instead offend the people you're trying to retaliate against?