On Sat, 13 Jan 2007 11:25:14 -0600, Tristán White wrote:

Some graffiti is breathtakingly beautiful, some is gloriously witty (think:
Banksy). Some of it can really brighten up a boring journey, or make a
disused train a work of art.

I have never, ever, seen any graffiti on any part of any transport
system that was in any way aesthetically pleasing.

Quite the opposite, in fact.