Stencils are cliches. They're made to create an image quickly. Bansky gives an instruction of making it properly:

* Think from outside the box.
* Collapse the box and take a fucking sharp knife to it.
* Leave the house before you find something worth staying in for.
* Spray the paint sparingly onto the stencil from a distance of 8 inches.
* Be aware that going on a major mission totally drunk out of your head will result in some truly spectacular artwork and at least one night in the cells.
* When explaining yourself to the Police its worth being as reasonable as possible. Graffiti writers are not real villains. I am always reminded of this by real villains who consider the idea of breaking in someplace, not stealing anything and then leaving behind a painting of your name in four foot high letters the most retarded thing they ever heard of.
* Remember crime against property is not real crime. People look at an oil painting and admire the use of brushstrokes to convey meaning. People look at a graffiti painting and admire the use of a drainpipe to gain access.
* The time of getting fame for your name on its own is over. Artwork that is only about wanting to be famous will never make you famous. Any fame is a by-product of making something that means something. You don't go to a restaurant and order a meal because you want to have a shit.

Everyone should read the manifest on his site.

So, go, read and watch. One should know about such people.