In Turkey, BTK ( Information Technologies and Communication group, http://www.btk.gov.tr/ ) send a notification to hosting providers and ask them to remove the sites (which includes some words like tube,adult,fire,porn) or providers will be punished.
http://translate.google.com.tr/translate?hl=tr&sl=tr&tl=en&u=http%3A%2F%2Fwww.webrazzi.com%2F2011%2F04%2F27%2Fbtk-alan-adi-teblig%2F
( site translated by google translate )
