What's your take on graffiti, tags and such?

I've seen Graffiti in an array of places from the side of backstreets to trains. The art style is a malleable type in that everyone interprets it differently and it is individual. I like the kind of graffiti dedicated to someone who is no longer with us. For example one of my favourites is located in Southend On Sea in the United Kingdom. Dedicated to the late Keith Flint, Lead singer of The Prodigy.

In terms of it actually happening. If it brightens up a dull wall and they have permission then I am all for it. The whole tagging the trains and factories to show you're "A social Rebel" thing is just juvenile. Vandalism is stupid too, keep it on paper or where it is allowed to be sprayed and we can all live in peace and handcuff free