Manifold recently added the option to dislike a comment:
Will this feature last a month?
I will look at Manifold at some point on December 15 and resolve this market according to what I see in the UI. If I'm unable to use Manifold on that day for some reason, this will resolve according to what I see the next time I log on in the following days; or, if there is consensus among traders about whether this feature was present on December 15, I'll accept that for resolution.
@ian I actually still haven't used it! I don't think I like the idea of low-content negative feedback. I'd usually rather provide some more detailed response, or support/like someone else's more detailed response. (Or, if it's just a troll, I'd rather not feed at all.) I'm a bit curious how much use you're seeing overall!