Some people become cops because they want to make the world a better place. Some people become vandals because they want to make the world a better looking place.

My lawyer's opinion is that the cops might not actually be able to charge me with criminal damage any more - because theoretically my graffiti actually increases the value of property rather than decreasing it. That's his theory, but then my lawyer also believes wearing novelty cartoon ties is a good look.

Art is not like other culture because its success is not made by its audience. The public fill concert halls and cinemas every day, we read novels by the millions, and buy records by the billions. 'We the people' affect the making and quality of most of our culture, but not our art.

There's nothing more dangerous than someone who wants to make the world a better place.

I know street art can feel increasingly like the marketing wing of an art career, so I wanted to make some art without the price tag attached. There's no gallery show or book or film. It's pointless. Which hopefully means something.

But there's no way round it-commercial success is a mark of failure for a graffiti artist. We're not supposed to be embraced in that way. When you look at how society rewards so many of the wrong people, it's hard not to view financial reimbursement as a badge of self-serving mediocrity.

It doesn't take much to be a successful artist-all you need to do is dedicate your entire life to it.