I think watching TV too much is bad influence on people. However, watching TV is also able to use the way to relax. For me, I don't have time to watch TV on week days, but when I'm too tired to do something, I sometimes watch TV to take a rest.
However, TV brings bad influence to children. For example, a lot of suicides of students happened. This expanded by picked up news, I think. So TV has great influence on people.
