Blocking of You Tube

Several countries have blocked access to YouTube since its inception, including the People's Republic of China, Morocco, and Thailand. YouTube is currently blocked in Turkey after controversy over videos deemed insulting to Mustafa Kemal Atatürk. Despite the block, Turkish Prime Minister Recep Tayyip Erdoğan admitted to journalists that he could access YouTube, since the site is still available in Turkey by using an open proxy.
On December 3, 2006, Iran temporarily blocked access to YouTube, along with several other sites, after declaring them as violating social and moral codes of conduct. The YouTube block came after a video was posted online that appeared to show an Iranian soap opera star having sex. The block was later lifted and then reinstated after Iran's 2009 presidential election.
On February 23, 2008, Pakistan blocked YouTube because of "offensive material" towards the Islamic faith, including display of the Danish cartoons of the prophet Muhammad. This led to a near global blackout of the YouTube site for around two hours, as the Pakistani block was inadvertently transferred to other countries. Pakistan lifted its block on February 26, 2008. Many Pakistanis circumvented the three-day block by using virtual private network software.
On January 24, 2010, Libya blocked access to YouTube after it featured videos of demonstrations in the Libyan city of Benghazi by families of detainees who were killed in Abu Salim prison in 1996, and videos of family members of Libyan leader Moamer Kadhafi at parties. The blocking was criticized by Human Rights Watch.
Schools in some countries have blocked access to YouTube because of students uploading videos of bullying behavior, school fights, racist behavior, and other inappropriate content.

Source: Wikipedia