Computer games

Do you like computer games? I don't. But my husband is addicated to them. Before, he was addicted to Counter Strike, but now he is addicated to the World of Warcraft. He even can play the computer games for almost a whole an entire day, with the exception of except for eating, and using the toilet. I always felt get so bored about with this (or you can replace this with... "I find this so boring"). In my opinion, playing computer games are a waste of time.  It's bad for the eyesight, and it makes people sit in front of the computer for so such a long time, that they don't have time to do exercise. In the long run, their health will be badly ("adversly"...is a better word to use) affected. It's harmful to people, especially to children. I feel that most of the computer games are full of violence and that children would copy the games and become violent. So, the parents should manage their times in playing computer games. And As for the adults, they should also schedule their times and don't not play for too long.

Ex: playing computer games are...it becomes plural because you are speaking of more than one game; if you were only speaking of only one, than it would have been written: playing a computer game is

I also placed a comma (,) between eating and using the toilet since they are two separate actions. :-)

"I feel that..." because this is your opinion and not a fact.

I moved your sentence " It's harmful to people, especially to children" to help you support your argument