Billboards are targeted at a very specific demographic: drivers. They're designed to draw attention away from the road and to whatever it is that they're trying

Billboards are targeted at a very specific demographic: drivers. They're designed to draw attention away from the road and to whatever it is that they're trying to sell. That reason alone is enough to ban billboards: we can't tell drivers they're terrible people for glancing at their phone for a second to get directions while simultaneously allowing corporations to plaster the roadway with ads that are deliberately designed to distract them.