Back in Bonn after my holidays I had to catch up on a few things. When I left the B-IT after midnight I was stunned by the sight of the post tower (http://de.wikipedia.org/wiki/Post_Tower) – as it is all lit up. Another example of a interesting and large scale public display.
However I wonder if behavior where energy is used to quite some extend (or wasted) will be judged in 20 years similar to the way we see nowadays the pollution of rivers and air that was common in the first half of the last century.