I believe you are referring to a sentence that talks about "good folk". You can use it as a translation for people there. But in a sentence where we speak about something not being human, folk does not really make sense in English.
it is like. "It is not a man-human" vs. "he is a good chap". You would not say "it is not a chap" meaning that the object-creature is a non human.
It is a bad way to notice, do not do that. Normally I would just delete them and swear. This way I knew it was you so I swore a bit less...
We do not really know what we should do with such nonsense reports. It is just a nuisance to delete these but they don't tell us anything useful. Just that someone was unsatisfied in some mysterious way.