Bumper Stickers for Self-Driving Cars

In a world of self-driving cars, what’s going to happen to the art and tradition of bumper stickers? Will our gaze be ever drawn to these cheeky statements while traveling automatically? Is the car going to be less of extension of the self and more of a family member, with its own personality, affiliation and trite jokes? And what about the possibly long and turbulent period of coexistence between human drivers and AI?