I settled for one from some cranky Evangelicals blaring CONTRADICT, conveniently posing the question that would lead us into exclusivism/ inclusivism/pluralism. But what was even more fun was thinking about these as bumper stickers, a quite specific form of (attenuated) communication. I remarked that, vague though it be, I'd rather share the road with someone sporting COEXIST than most bumper stickers - though one would need further research before predicting better road behavior. Seeing the US religious landscape as a highway was a bonus!