As you know, pieces get buffed, or cleaned, regularly. With the help of these pages those pieces can still be viewed. It does not need to be lost forever in a blast of sand and water or because someone else painted over it. It will still have a public place here where it can be viewed freely.
Not all of the work here is illegal. Some of the pieces have been commissioned by various groups, or are places that may be painted on freely without risk of prosecution. If more of these places were made available it could help young artists stay away from the lawless side. The current situation is, if you want to get your work noticed you have to paint in unauthorized places.
Some have even argued that graffiti has no place on the Internet. To me this seems pretty absurd. As we all know, the Internet contains information on just about everything, so why not graffiti? Graffiti galleries are ideally suited to this new, unrestricted, free for all technology. I see no reason why the two cannot co-exist together.
Fortunately most visitors like these pages. I have had many letters stating they are grateful for what I am doing. Thank you to all who have written in.