As most who probably read this blog know, it was recently talk like a pirate day. Like the pirate bay usually does, Flickr changed their logo a bit. Via Waxy I found that there were at least a few that were not amused, from those who thought the interestingness was lacking to those who thought their accounts compromised or piracy officially supported.
The pirate bay usually includes an explanation, alt text or links to a search that gives a clue. I missed the Flickr change so can’t say if it was done similarly.