This would have to be an idea for GetSatisfaction. Koodo can't just implement something like this.
But I don't think this is a good idea. As you've noticed or should notice, this is called the Community. How would you feel if you started an idea or question that just got dislikes and was effectively shut down because a few people didn't like it? The Community is about helping others. As a customer, that is not something I would want happening to me on my carriers forum. No one likes being shunned. I would be livid and it effects Koodo's image.