I worked with a young urban type for a while, and one morning while walking to the office together I expressed my dismay at the sad state of our office block.

I worked with a young urban type for a while, and one morning while walking to the office together I expressed my dismay at the sad state of our office block. He countered that it was actually an improvement over the otherwise dull corporate architecture. That it was dull I could certainly agree with, but not that scribbling illegible nonsense with spray paint on every surface is an improvement. So I think there actually are a lot of people with a sincerely held belief that they are actually improving their environment when they do these things.