Why would you say a billboard is any more disruptive than whatever else I&#x27;d be looking at if the billboard weren&#x27;t there?  Maybe it&#x27;s a tree, or a fence, or a cow, or a farm tractor, or just sand and dirt... but when you&#x27;re driving on the Interstate, at some point you&#x27;re going to get bored and your eyes are going to wander looking for <i>something</i> to fix on for at least a few seconds, other than the road in front of you.  Well, mine do anyway.  Maybe I&#x27;m abnormal.<p>Anyway, I acknowledge that a lot of people get really worked up over billboards.  I just have a hard-time getting excited over that.  Maybe there are better examples of this &quot;cognitive pollution&quot;.  <i>shrug</i>