[dageshi]

I genuinely think slashdot did it best, being able to upvote comments for different reasons. Be they "funny" or "insightful" and then letting you sort by what you preferred to see.

[Scapeghost]

That kind of system loses its point too, like on Facebook etc.

For example I could mark your comment "Funny" to "laugh at you for even suggesting such a thing" :)