Using the computer, good points and bad points

I can gather information which I want to know by using the computer. Also, I can buy anything which I want to buy.　I think Internet is very useful for us. But, Internet has bad point. Because all people can fill in a bulletin board on the web. So, many people will be hurt by the notes. And hurt people will be worried. While there is the site of mass suicide on Internet. What a pity that there should be people who kill themselves. I think that we use the computer moderately.