Power of Internet

When I think about power, Internet comes into my mind at first tme. It's more and more popolur to use Internet in our daily life, like Facebook, Twitter,Blogger and so on. We'd like to share our states, pictures on the Internent. However, has anybody ever thought about that our information may be revealed?
I think the power of th Internet is so strong and people cannot even control it. Just like so famous people, if they say something sensitive on the Internet, they may be attacted by other people on th Internet. It seems that is not safe on the Internet. The power of the Internet is so strong so that many people use it to express the postive side like protecting environment while some people use it to express the nagative news. For me, I don't like to post so much things and I also don't like to share my personal information on the Internet. However, I would like to share my stories to my friends in the real life.
In some points, Internet can help us a lot; however, we should keep an eye on our personal information that shared on the Internet.