Another forum I use has a system where your karma (or rep as it's called in those parts) isn't a direct representation of the amount of + or - others give you, but only goes up or down when a certain net number of other posters (I've no idea what the exact number is) either + or - one post in a single direction. Not something I would generally recommend, as rep-related drama still exists and tends to involve either groups of posters down or up repping all of a single user's posts or single person making many alternate accounts to do the same, though it may work quite nicely over here if the amount of exalts or smites on a single post is around 70% of the number of regular posters (or some other high but otherwise arbitrary percentage) and the majority of the forum avoids using it as a tool for drama.