Just seeing those things annoys me and I try not to focus too closely on them, lest my head explode.
But in this case, the driver was also an asshat who refused to signal and I was stuck behind him for ages. And you know what I noticed? This. (Or is it these?) Hanging from the the back of the truck:
A search on Flickr revealed a few creative common's licensed images that will give you the full effect: