I tend to ascribe a naïve etymology of pre-judgement to 'prejudice', so I suppose that is the sense I was using it there, but I really wasn't appealing to any "textbook definition" I know of.
I'm somewhat glad for aa's ban. I've lurked LW for a while now, and have found a lot of content posted here extremely interesting. Seeing aa's posts in open threads on incels every week being upvoted, containing content I felt was extremely prejudiced and malformed, with no apparent improvement over time, unnerved me quite a bit, and I felt like I was not only wasting my time reading his posts, but also gave me a negative impression of what LWers think. This was enough to stop me from browsing open-threads/browsing less wrong for a while.
Not being a constant user of LW, I was unaware of vote manipulation, but I did feel myself being confused by the apparent clash between aa's upvoted posts on incels and general concept I had of LW, so it shouldn't have been hard to conclude that there were alternative explanations for his upvotes.