I live and work in central London.
Having seen the poster everywhere for a while now, it has been hard to avoid learning a bit about the image's history, including the recent hilarity with the EU trademark ( http://www.telegraph.co.uk/news/8785585/Battle-rages-over-Ke... ) and the image's organic growth in popularity from 2005 ( http://news.bbc.co.uk/1/hi/magazine/7869458.stm ).
I think it's funny to see people use things in apparent ignorance of their historical context; for example I was totally bummed that http://www.gophercon.com/ wasn't about the protocol.
people use things in apparent ignorance of their
historical context
The people behind the Go language are definitely aware of the gopher protocol.A meme that Tumblr uses pretty frequently, at that.
It's a meme, the equivalent to using a cat image.