Facebook have many disadvantages on teenagers than advantages. Why I say that? Because as we known most of the teenagers don’t realize the negative impact of Fb on their life. And, the main reason is because they are already addicted to it. And, this addiction can lead to several negative developments.
The first disadvantage effect of fb is that a teenagers user starts loosing interest in his or her surroundings. They would be addicted to Fb and the only thing they would be concerned about will be their “own” world, which is inside Fb.

The second disadvantage effect is that the real-world social interaction will start diminishing. There is no doubt that they are going to have hundreds of friends on Fb , but with how many of them would teenagers be interacting out in the real world. As a human being, they are a social creature and naturally require real-world social interaction. When they are going to spend maximum of their time on the Internet, teenagers are going to decrease their communication and social skills.

Another negative impact will be on their health. There is a very high chance that excessive use of Fb leads to the users becoming obese. They would be sitting most of the time in front of the computer, eating snacks and without any physical activities. And, over a period of time teenagers are going to accumulate all the extra pounds.

So guys, do you think facebook give us bad impact?