academic organisations.

the law enforcement agencies. 

groups of people separated over wide areas.

people who write too much information about themselves. 

is translated into many languages

can be used in court. 

is sold to the government

gives a good description of the user's personality

more profound

more emphatic

more detailed

more spiritual

contact predators. 

be too free with their personal information. 

download viruses. 

upload copyrighted music. 

Hardly any

Only

Not any

Some

there has been rapid development of social networking sites.

everybody is trying to copy Facebook. 

social networking works in all languages. 

the development of social networking is unplanned. 

Most users have high disposable income. 

They are cost-effective to advertise on. 

Detailed information on each user allows targeted ads. 

They can influence consumer behaviour.

can damage business reputations. 

advertise on business web sites. 

are about friendships. 

are being used by businesses for marketing.