Advantages and disadvantages of blogs

Blogs are very cool, it is a very cool media to communicate things to the world.
Advantages: In blogs you can write and write how much as you can without wasting paper. All the information you write the world can see. You can be the owner of one account and have a variety of different subjects. Blogs are very nice because you can turn homework using it, you can make presentations, you can make biographies, stories, etc. and have a nice background you can choose. Blogs are very effective and useful, it has many tools you can learn how to use and it is a fast way of writing information instead of writing it by hand. Another nice thing is that it has a spelling corrector and it tells you when you misspelled something
Disadvantages: Even though I think the blogs are very cool, we have to be careful sometimes. People like putting a lot of information about themselves, and that is not necessarily good because everyone in the whole world can see your blogs, and you can't avoid it, so if you put a lot of information about yourself you are risking your life and someone can kidnap you or stalk you. Another thing is that you may put invalid information so if people read it and use you as a reference they will have a bad mark and they may report an abuse.
We can have a lot of fun in the internet and we can learn a lot of things, but we should never exceed limits.