Outdoor advertising, aka: billboards, aka: intrusive media. Go just about anywhere and you'll be accosted by acres of cluttered, garbled and often illegible visual messages. Ah, it is a temptation, though! All that square footage! All that room to put so much … stuff! The problem is 1) in the context of the great outdoors, even the largest billboards are tiny and 2) unless you're perpetually stuck in traffic next to said billboard, there's precious little time to digest t