I am going to take a chance here, and assume that you are reading this post cos you are pretty good at managing comments and messages on your Facebook page.
Face Book Dark Posts are those posts which are unpublished which appear on everyone else’s newsfeed and you are not capturing on your normal respond mechanism.
A larger part of criticism, competitor recommendations happen on ads which are targeted at newsfeed and most advertisers seems to be ignoring to moderate the activity on such Dark posts which are recalling killing their brand.
Imagine when someone sees your ad on their news feed if the first comment is a negative remark about your brand. It’s like you are repetitively spending money to shoot your self in the foot.
How to Manage Comments on Dark Posts?
if it’s just one page