For once, everybody shares one opinion. Feels good, too.
Just have a button that says "Help hide this post" or similar then make it hidden by default when it hits the threshold, readers can bring it back with one click.
Reminds me of "mark as spam" on Youtube. That, too, was abused quite a bit though, especially while not fine-tuned.
I think an upvote system works best, somewhat like Facebook's "like" system.
You're right that it's better than what we just had. But what about no
system? I doubt any of these are going anywhere. If there was a way to distinguish good from medium content for everybody, we'd be using it to fix the world before the Bitcoin forum. Any positive voting system just makes popular statements even more popular. They work against
debates, but debates are what a forum like this is, at least partially, about, right?