How do you look at people on twitter
No this is not possible.
No they can't.
No there is no way of knowing this.
No you can't.
There is no way of knowing who has viewed your profile.
No, there is no way to tell who has viewed your tweets.
There is no way to tell if someone looked at your social networking page. This goes for Facebook, Myspace, and all of the other forms of social connections.
They are notified.
You can't unless they are tweeting and their tweets show up on your timeline .