Pros and Cons for On-line Activities with Registered Identity Internet is now joining in the traditional media to provide news and information of all sorts. The most distinguishing feature of internet compared with other media is the " two way" communication function. Accompanying the popularity of Internet is the discussion about whether the registered identity should be required. Those who support this policy would argue about the responsibility and the safety of using Internet. And Internet is not only a bridge but also a wall, so that it leads people feel like that they can do whatever they want and there is no risk to do so. No registered identity is to say one can get away with whatever they do on Internet. However, most people do not agree with this ideal. The reason why they are not intend to use their real identities is about privacy and free-speaking. If Internet takes registered identity, everyone will be dangerously exposed. To some degree, their will be no safety at all. With what I have analysed above, I came to a natural conclusion that registered identity on internet is not a good ideal. If we do so, there will be a great loss of internet users as concerning more privacy now. And the personal freedom of speaking will be decreased and the internet will be the tool of government to control the society. Anyway, freedom and safety should be put one the first place since internet is becoming a favor.