Teenagers like to computer games so much, some even drop out of the class and they hang around the street， going to the Internet bar, and are immerged themselves in the computer games. As we all known, Internet bar is not a good place for teenagers to come. First, there are all kinds of people in that places. It has been reported that many accidents have happened in the Internet bar, some people have fought each other and then cut people, even people died there. It is so dangerous. Second, as the teenagers are so innocent, they may be seduced by some bad people in the Internet bar, the teenagers may be adducted to other places and never come home again. Internet bar is not a safe place for teenagers, so they should learn protect themselves and stay away from it.