I got mentioned in the KF conversation so here are my 2 cents.

Very coincidentally, I saw that thread (https://boards.4chan.org/a/thread/163688083) in the report queue when it was about 30-40 posts in.
I like/am actually curious about Ibis-chan so I went in, however, 2/3 of the posts were about KF in general.
My feeling on that matter is that the fandom could have created another thread(s) for the other kind of KF discussion. (2 KF threads, yay!)
However, that is clearly unattainable short of allowing communication|throwing all the other posts into another thread|effort in creating another thread.

It's the love for a topic that makes people try to continue the conversation and I don't necessary see it as a bad thing. Everyone here is after all doing work for free, for the things they love.
Also, at this point, there isn't much circle jerking or in-thread bitchfights for KF threads.
Would it be better to engage and allow the janitors who like the series/topic more to direct the flow of the subject.