Idea for a plugin: agree or disagree with a post

Hey! I’m having a idea for a plugin. Maybe something like this has already been done but I haven’t found it yet.

The basic idea runs areound commenting and feedback from readers. As you probably are aware, it might be tricky to get comments and build discussions around a post. Often people read but especially if they agree with the post itself, they don’t comment because they just agree with what’s said.

Yet, as a blogger, you would like to get feedback.

So here’s an idea – wouldn’t it be great to put two buttons to each post – Agree and Disagree. Clicks on each will build a list of posts with most Agree’s and most Disagree’s.

Does anyone know a plugin that can do that or even be interested to make such a plugin? I dont know how to code that so… ??