That is a very interesting article and I do agree with you re: Apple.
I think the majority of the people out there don't realize the tremendous cyber footprint they leave. People put all sorts of personal stuff on facebook and other sites not aware of how it can come back and haunt them.
Banksy's work is sort of interesting, there was one he left not far from where I work. This is a good documentary about him:
http://www.imdb.com/title/tt1587707/