Police

1.) Yes . have communication and citizen give some information to police
2.) Hack the computer of government and said something which will hurt the others
3.) Yes . can have interaction between police and citizen

Teenager

1.      It is because the social networking sites will shorten attention spans, encourage instant gratification and make young people more self-centered.

2.      The social networking sites such as Twitter, Facebook, Bebo, they can easy to find our friends, and we can talk every time. If our friends no time to talk with us, we also can write a comment. Also, some friend that we are not very close, we will try to talk with them, because it is easy than face to face. And we can find some friends which have some interest same as us. However, we may not know their interest without social networking site.

3.      If we post some information that about our identity, our Privacy is intruded. For example, you do not give your sit to elderly on the bus, some people think that it is a poor behavior, than they may take some photo and then put it on the sites. After that, they find the information about your identity and try to hurt you, Also, some hacker will destroy your computer.

4.      Yes, we can avoid post many information that about your identity. And download some software, e.g. Norton, Kaspersky, McAfee, that can prevent, detect and remove computer viruses worms and Trojan norses.

Parent

1.) Positive : can communicate with children ; negative : have many pornographic violence and more bad information
2.) The life
3.) Help parents to learn how to use computer
4.) Social network make it worse , teens use computer – release stress in the internet, but not to the parrent. It won't help to solve the problems between family and teens.

Educator

1.) In networking sites , there have many new information about education and it will update anytime so it can help teachers to teach student .

2.) No . Some soical networking sites will have not fit to students information in there .

3.) Yes , I think play in soical networking sites is a trend and student are use it so teachers can through them to talk with student . Let the relationship between teachers and students become closer .