Evolution of a Meme

It has been said that a good meme will propagate itself and evolve to fit any available niche.  In the ecology of graphics this is most certainly true when propagated for humor:

This can be seen around the bay area, where Mad Dog is located.

This I spotted in front of NoiseBridge, our local hackerspace.  I swear I was only there to get dinner from the taqueria down the street.