I don't know, I just searched "Grok" on HN and the 3 most popular stories of the last week have all been flagged killed while having 75+ points and 30+ comments. I can't imagine there are many single world searches that would return that result.

I understand why you gave the general answer you gave rather than addressing this specific example, but I'll just say this story would be a good place to look for those potential "agenda-motivated" flaggers.