Banksy’s street graffiti career began aged 14. He started as a free hander but, unable to draw fast enough to evade the police, he was arrested several times, so he switched to stencilling. In his book Wall And Piece, he said: 'When I was 18, I spent one night trying to paint late again in big silver bubble letters on the side of a passenger train. British Transport Police showed up and I got ripped to shreds running away through a thorny bush. The rest of my mates made it to the car and disappeared so I spent over an hour hidden under a dumper truck with engine oil leaking all over me.
“As I lay there listening to the cops on the tracks, I realised I had to cut my painting time in half or give up altogether. I was staring straight up at the stencilled plate on the bottom of a fuel tank when I realised I could just copy that style and make each letter 3ft high.”
“I got home at last and crawled into bed next to my girlfriend. I told her I'd had an epiphany that night and she told me to stop taking that drug 'cos it's bad for your heart”
Banksy’s graffities are anti-war, anti-capitalist or anti-establishment with a twisted sense of humour and because of his unique sense of humour he can make these so called “boring “ issues really interesting.