If you feel dirty, insignificant or unloved, then rats are a good role model. They exist without permission, they have no respect for the hierarchy of society, and they have sex 50 times a day.

Writing graffiti is about the most honest way you can be an artist. It takes no money to do it, you don't need an education to understand it, and there's no admission fee.

Once upon a time there was a bear and a bee who lived in a wood and were the best of friends. All summer long the bee collected nectar from morning to night while the bear lay on his back basking in the long grass. When winter came the bear realised he had nothing to eat and thought to himself 'I hope that busy little bee will share some of his honey with me.' But the bee was nowhere to be found - he had died of a stress induced coronary disease.

All graffiti is low-level dissent, but stencils have an extra history. They've been used to start revolutions and to stop wars

I like to think I have the guts to stand up anonymously in a western democracy and call for things no-one else believes in - like peace and justice and freedom.

Graffiti is only dangerous in the mind of three types of people; politicians, advertising executives and graffiti writers.

You're advised not to drink the replica Arab spring water.