Fences are necessary. They contain children, dogs and minor livestock. They exclude deer, cattle and others who are unwanted within an enclosed space. Some obscure unwanted scenery. However, even the more ornate sorts are more functional than aesthetically appealing.
That is why hedges are popularly grown to obscure fences that obscure outside scenery. Climbing vines take up less space than hedges, but are likely to damage the fences that they are intended to obscure.
Where I lived in town, the garden in back was surrounded by fences. I loathed them. I grew a grapevine on one. Another one was outfitted with a trellis of twine for pole beans to climb. Tall zonal geraniums obscured at least the lower half of the fence behind the laundry yard. I would have preferred no fences at all.
There were no children or dogs to contain. Nor were there cattle or deer to exclude. Except for the laundry and trash yards, there was no unwanted scenery to obscure. Nonetheless, the neighbors wanted fences, probably because they all believed that backyards should be fenced. It was just how it had always been.
Some urban fences are more like high and solidly constructed walls. Batons cover the seams between planks. Where local ordinance limits the height of fences, lattice is commonly added on top to (sort of) lawfully increase height. It is difficult to grow much on the shady north side of such tall fences.
I am fortunate that I do not work with many fences anymore. However, an area at work is surrounded by cyclone fences. It is necessary and practical, but would be very unappealing around landscape situations. I put pole beans on one, and two grape vines on another. If I must contend with them, I may as well take advantage of them.
No, it is not an oxymoron. ‘Yellowwood’ is the common name for a few specie of Podocarpus. The evergreen (or ‘everblue’) foliage of ‘Icee Blue’ yellowwood, Podocarpus elongatus ‘Monmal’, really is as silvery grayish blue as the name implies. It can be as striking as some cultivars of Colorado blue spruce. It grows slowly in narrow columnar form to only about fifteen or twenty feet tall.
What makes this Bullwinkle worse than most is that I pruned it like this myself. What makes it worse than worse is that it did not need to be pruned in this disfiguring manner for clearance from utility cables like the last one I wrote about was. 
Just like real rosemary, the coast rosemary can either be a low ground cover or a dense shrub. Lower cultivars can get nearly five feet wide without getting much more than a foot high. Shrubby types can get nearly six feet tall without getting much wider. Shrubby types are more popular than ground cover types, and are often pruned so that they do not get too broad.
It was so long ago that I barely remember it. I was just a little tyke. My older sister tripped on the driveway and broke one of the Japanese boxwood shrubs in the hedge on the edge of the driveway and front walkway. The hedge was still young then, and not completely filled in. My Pa replaced the missing shrub shortly afterward, but not before my younger brother and I learned that the gap was a shortcut through the hedge. The puny new shrub was not enough to compel us to go around like we had done before. Of course, it did not survive for long. It too got broken off.
If good fences make good neighbors, what about hedges? If only it were that simple. There are all sorts of evergreen hedges to provide privacy, obstruct unwanted views, disperse wind, define spaces, or muffle noise. They can do much of what fences do, and muffle sound better. The problem is that they are composed of living plants, shorn into submission and very unnatural shapes.