[dragonwriter]

> So there are systems out there which differentiate between a post someone disagrees with and one that's low quality,

...which don't actually mean anything in practice because (1) disagreement effects perception of quality, so even honest voters in a system which distinguished the two will still be likely to mark a post that they disagree with as low wuality, and (2) people in practice, given the option, will mark a comment or post in the way that produces the effect they wish to happen to it, so if they want a post demoted because they disagree with it, and the forum offers marks for disagree which don't demote and some other mark which does demote, they choose the latter.

[CM30]

Dunno, never seen this happen myself on most sites with reaction/rating systems. Okay, the list of examples I can remember off the top of my head is only two (Wario Forums, The Admin Zone), but neither seems to have issues with people abusing the ratings system to dislike posts they merely disagree with.

Maybe it stops holding up on Reddit scale though.