Psychology: Grafitti/Grafitti Vandal(s) What's the psychology behind grafittit?

What mentality do graffiti vandals have?
Teens who get involved in graffiti 'tagging' may be showing early
symptoms of a personality disorder, an Australian psychiatrist says.
He says the study, presented at an international child and adolescent mental health conference in Melbourne this week, found that teens who graffiti &quot;are significantly different to those who do not graffiti&quot;.
&quot;These young people ... were very antisocial on a range of other factors. They weren't just mildly conduct disordered, they were scoring to the extreme range of antisocial behaviour.&quot;
He says the study found adolescent graffitists had done around six to eight other acts, such as setting fires, beating people up and stealing.
&quot;You can pick many of these young people somewhere around the age of three,&quot; he says.
&quot;The average kindergarten teacher will tell you, I don't like that child, I can't work with them, they spit at me, they spit at the other kids, they hit people, they won't learn.
&quot;You can certainly predict which ones will go on to antisocial behaviour, and within that graffiti is going to be one of the things that stands out.&quot;
Martin says tagging conveys a number of messages, from saying &quot;hello, I'm here&quot; to being a territorial marker and an expression of rage against authority.
http://www.abc.net.au/science/articles/2006/09/13/1737822.htm