Today I saw a bunch of comments on different Manifold markets that (in my entirely subjective opinion) are not-civil. Example:

https://manifold.markets/IsaacKing/will-cancer-be-cured-by-2035#tX1jByPBxxkJFZbPbjA2

(As far as I can tell: user A resolved a market in a way that many other users felt was incorrect; user B posted comments on all of user A's markets saying "user A resolves markets incorrectly"; user A responded by posting messages like the above on all of user B's markets. I don't want to adjudicate who was right and who was wrong but at some point things clearly descended into "not-civil".)