Does media affect kids and how they act?

I actually agree to this state for a few reasons. Kids, instead of using their time to do productive activities such as studying and what not, just use their extra time they have to watch trashy TV or listen to music that is just as trashy. Instead of this, kids could be doing things worth their time, such as getting outside and playing some kind of sport and getting exercise. Perhaps, they could even take up musical instruments, such as the violin or viola or cello. For instance, last night I spent almost 1 1/2 hours of my time watching TV while instead of using that time watching some show, I could have spent that time studying for a history test next week.