http://www.theregister.co.uk/2013/07/19/smut_lovers_in_dirty_protest_over_tumblr_pornageddon/

Porn aficionados, sex bloggers and perverts are up in arms after Tumblr wiped all naughty content from its search facilty - neatly erasing at least half of the cats'n'porn site's raison d'être.