Here at Spark, we're lucky to have thoughtful and constructive discussions on our blog. But elsewhere on the internet, it's not hard to find heated and sometimes hateful comments.  These comments can be as silly as "first!" claims and comments questioning the validity of the subject matter. As you likely know, a few bad apples can ruin a good discussion.

News websites, including the CBC, are working on more sophisticated ways of attracting thoughtful comments and discouraging the unconstructive ones. For example, Gawker Media implemented a tiered commenting system last year. At first, they saw a big drop in comments but they have since doubled. Making it harder for people to comment, it seems, makes people want to comment more.

To find out more about how commenting systems are changing across the World Wide Web, we're working on a story for next week's show. We're interested in your ideas and experiences on news sites. Have you had a good or bad experience with fellow commenters? Do you think people should have to use their real names when leaving a comment? How do you think news sites should deal with comments?