Some people who aren't religious are content to leave it at that. Others feel the need to attack religion aggressively. Those people tend to get pretty egotistical, to the point that there's a whole movement of them that calls themselves "Brights." Because they're smarter than you. Get it?
One of the "Bright" activists is Richard Dawkins, a mediocre popular science writer who promotes unfalsifiable theories of macroevolution. One "Bright" project he's helped fund is the Atheist Bus, an ad campaign on buses in England. The ads read "THERE'S PROBABLY NO GOD. NOW STOP WORRYING AND ENJOY YOUR LIFE."
When I saw these ads, I thought they didn't go far enough. If we want people to stop worrying, we should let them stop worrying about other critical issues.
Here's my expansion of the project: