When it comes to predators of press freedom, the globe's most popular video sharing service is often seen as a threat -- or, in the case of angry Serbs, used as a conduit for threats. Two cases of note from Reporters Without Borders:

• In Pakistan, YouTube has been blocked by the Pakistan Telecommunication Authority because of “non-Islamic objectionable video,” and will stay so until further notice. Don't Block the Blog, a free-speech alliance of Pakistani bloggers, thinks it might have something to do with a posted video that showed testimony of voters claiming they witnessed fraud during the Feb. 18 elections.

• In Serbia, a series of threats against independent radio and TV station B92 have culminated in a video posted on YouTube portraying two B92 presenters being shot dead. "The makers of the video superimposed the sights of a gun on B92 broadcast footage, and had the gun fire on the B92 logo and the faces of the two presenters," Reporters Without Borders states. "This sequence is preceded by words accusing B92 of responsibility for the 'black clouds that have rained on Serbia.'" In the wake of Kosovo's declaration of independence, demonstrators have also tried to storm the station.