Many street artists of community groups get asked to paint walls, etc, but what is your opinion on people who graffiti on public property with spray paint or other materials without permission. If it is a proper painting (rather than rude words, etc) that you would happily admire in a gallery, do you think it is art, or do you consider it vandalism?
Some of these paintings are brilliant!
They are done by very talented artists, however, and it is a big however, I do not agree that anyone can just deface a wall/building without permission, so I would therefore consider it vandalism even though some are so good.
Some are atrocious, and need to be cleaned off, and this is possibly an ongoing problem for councils as it is so expensive to remove this sort of thing.
If they haven't got permission, then no matter how beautiful it might be, I still think it is vandalism, because the public or government may not want it there, and that person hasn't got the right to paint on something that doesn't belong to them.
It would depend on if it was private property or not and if it was whether the property owner was ok with it. It would still be vandalism if the owner didn't like it, but in a colourful area where street art is the norm it would be considered art.