Consider what it would actually mean to ban billboards.  If they were on government-owned land near a highway, placed at the pleasure of the city or state, then sure, they can (and should) decide to retract that permission; no issue there.  On the other hand, if they&#x27;re on private land, then this suggests that a local government can ban you from posting a sign on your own property that&#x27;s visible to others.  Where does that stop, and on what basis could it occur at all?<p>Within cities, I&#x27;ve seen signs posted on the sides of buildings, presumably with the full permission of the building owner, because the building happened to provide a convenient space visible to a fair bit of roadway.  In residential areas, I&#x27;ve seen people post large signs on the sides or roofs of their houses, easily visible to the road.  And that leaves aside the numerous small picket or A-frame signs placed in non-highway areas, again on private property: houses for sale, garage sales, lost pets, etc.<p>As much as I hate advertising, how exactly would you reconcile such a ban with the first amendment in the US?