How comments for an article is important:
1. Encourage/Discourage writer. about the ideas potrayed by the writer.
2. Discussions leads to participation, futhermore giving the writer and the reader more idea.
3. Builds interaction, a positive attitude.
4. The reader can easily add up more thoughts giving the writer a clearer picture.
5. The writer expects comments from readers, or else why would s/he post stuffs in the internet, they want to be acknowledged, be it negative or positive.
6. The reader is what keeps the writer motivated and moving, and creating new articles everytime, which infact gets better everytime.
7. Everybody is a writer, only a reader and the comment they acknowledge separates a gem.
8. Rates a writer.
Well this is all i can think of at the moment!