And of course we listen to the wisdom of the bumperstickers
Bumper stickers can be commercial, religious, humorous, or in support of a sports team or other organization. They may promote or oppose a particular philosophical or political position. Bumper stickers are a popular way of showing support for a candidate for a government seat and become more common during election years.
Bumper stickers could not predate the introduction of the automobile bumper; the Ford Model T lacked bumpers to which bumper stickers could be conveniently attached, but the Ford Model A, introduced in 1927, had them. One online source credits the current bumper sticker to Forest P. Gill, a silkscreen printer from Kansas City.
The first bumper stickers appeared shortly before World War II; they were flag-like, and attached to the bumper by wires. Gill replaced the wire attachments with pressure sensitive adhesive, and as a result bumper stickers became more widespread and practical.