At it's most basic level, any poster could yank the approval rating of any other post, up or down.

But what I dream of, is a post ranking for anyone, which is based on the opinions of other posters. I'm willing to set up a server, where posters can rank posts, and their opinion would be conveyed to other posters IF AND ONLY IF, those other posters had selected them as an "opinion leader." If no-one had ranked a post on my server, the post would appear as neutral (or blank) on OzPolitic. Anyone not participating, would also see a neutral ranking.

I admit this is a "dangerous idea" and though I have wanted it on many forums, I'm only suggesting it now. Perhaps because I'm drunk, but I hasten to add I have the free time and the expertise to establish a ranking server. If you dare, I won't let you down.