By Julia Dorofeeva

Social Networking sites are becoming more and more powerful due to a fast media exchange ability and uncontrolled user generated content! This fact is more evident due to the latest events in China!

As BBC News reports, that China, ahead of the 20th anniversary of the suppression of the Tiananmen protests, has blocked several social networking websites: micro-blogging service Twitter, Hotmail accounts, business social network Facebook (according to Vz.ru) and the photo-sharing service Flickr.

In such a way China bans discussion of the events in and around Tiananmen Square in 1989.

Generally, Thursday 4 June is the 20th anniversary of the crackdown, when troops quelled weeks of protest by students and workers. China has never released a death toll from the suppression on what it says was a counter-revolutionary conspiracy. Hundreds are believed to have died in and around the square.

The BBC's James Reynolds in Beijing says that as the anniversary of what China calls the "4 June incident" gets closer, the Communist Party appears to be in a particularly vigilant mood - it wants to make sure that there is no mention of the subject whatsoever. So, access to Twitter was denied shortly after 17:00 (09:00 GMT) on Tuesday.

As you can see, now social media networking and niche social networks are taken into account on a government level as they are so powerful in uniting people, sharing news and planning actions. Does it mean that very soon Huge social networks will be powerful enough to start protests all over the world if necessary?