to find friends or have connect with someone
People in the UK can use the same social networking sites that people in the rest of the world use.
A disadvantage of social networking sites is that they are making traditional relationships obsolete. Some people use social networking and never bother to call their friends or visit with them.
Quite a few
a lot
The name for people obsessed with social media networking sites is Internet addiction disorder.
see [[How_many_people_use_social_networking_sites_worldwide]] for now
i dnno
social networking, such as asking questions to which you already know the answer in a public forum.
borred people
One of the key dangers of social networking sites is the exposure to untrustworthy people. There is no chance for face to face contact where one can see the body language of a person. People can use fake names, so you never know who they are.
About 15-20% of social networking users are under 20. If you use 600 million (users of facebook) * 3= 2 billion, that gives you an upper estmate of 400 million
None. Social networking sites do not kill people or cause deaths.