Is it possible to do a trial-run?
We already have the star rating system for threads which I believe is anonymous and it is being used. I don't know if there have ever been any discussions about that system. So why not extend that to individual posts or a thumbs up/down counter... either way, just a trial period to see how it goes.
It would be great if we could manipulate the ordering of the thread to pull up the star/thumbsup posts (order so the ones with more stars/thumbsup are at the top of the list) too.
I also like the idea of a 'read-later' or 'favourites' tracker... I use Opera and have been bookmarking threads but honestly I totally forget they're there and haven't been back to read any yet.