Hey, why not? We happen to know a lot of artists, and we're going to commission a couple of them to paint the inside of our fence when it's up. This is pretty close, I'd say.

where u least expect it

Public art is great. As a 12 year old, I wrangled permission from my parents to paint sea creatures (fish, octopus, seaweed) on the bottom and sides of our swimming pool. It lasted for only one season, but made a huge impression on me. (It also reminds me now how patient my parents were with me.)

An artist who lives on Craven Road (actually a lane, tiny houses on the east side, the west side a continuous fence) in Toronto has hung her weatherproofed canvases along the fence. Really adds to the community.
Sorry, no pictures but check out the Craven infill studio - http://www.theslowhome.com/folio/projects/craven-road-house/prodcravenroad.html

when I lived in Austin I knew people who hung art on their fences and their houses. I stole the idea and hung paintings on the back of my house whenever I threw a party.

i think it's fun. definitely unexpected.

Sure, why not.

This would be a fabulous use for all the paintings that used to end up in Busvan's Bargain Basement.

(Many of the paintings that were sold for a couple bucks there are probably loved as hip and retro now, so I'm actually not being snide.)

In the alley (Ames) in my neighborhood, there is a long fence where people put up their own artwork or found art...very cool stuff.

There was an article in Sunset a few months back with a chalk board outside on a fence. I tore it out an plan to do it to cover my ugly fence.