I'm not formally trained for ministry, I have no religious degrees, and I've never preached a message. But as a believer in Jesus, he's given me the command to share His gospel, so I'm going to put what He's given me out there, whether anyone accepts it or not.
"Free trip to heaven, details inside," and "Santa never died for anyone" are definitely cliché, but that's not my strongest feeling about church signs. I'm a little torn on whether they help or hinder the church.