Graffiti and... BANKSY! :D

Graffiti are  drawings on the walls, there are different types like: funny, dirty, terrible, colorful and original. Some people call this "artists" (who draw on the walls) "vandals". But there are people (like Banksy) who draw graffiti with a social messages! Of course there are a lot of graffiti without messages, dirty and stupid. I think the person who draw an original graffiti is really interesting, but the person who draws his name on the walls or paint on the walls of the church are vandals.
Banksy is an English 'artist'. He draws on the walls, he's very popular but we don't know who he is, because if the police know who is he, they arrest him, we only know: maybe he was born in 1974 in Bristol and when he was 14 he was already doing graffiti. Some of his graffiti have a social or political messages, they aren't dirty, vulgar or repetitive, they're colorful and original. But some person think 'he's a vandal' and other think 'he's very original'.